Current model of the Lincoln cent has the Union shield on the reverse (tail). Construct a line graph of your results. Chapter sections 1. Typically, densities are reported g/ml or g/cm 3 (which are equivalent because 1ml ≡ 1cm 3). Standard: The student uses expressions, equations, inequalities, graphs, and formulas In this lab we will be measuring density in a variety of ways through a Experiment #4 can be impractical to perform in a classroom, so online demonstrations Calculate the density of the penny by dividing the mass by the volume. The mass of a penny was 3. 13g/ml. Record your data in TABLE 1. Penny Set A was minted before 1982. The identity of the composition of these pennies will be determined. Next, use the balance to find the mass of six of these objects. Place the penny, heads up, on top of a paper towel. A kitchen scale, for example, is probably less accurate than a calibrated scale in a chemistry lab. The cohesion and surface tension of water becomes apparent when the drops of water you add to the penny reach the penny’s edge. What do you see? Dump the rest of the pennies into the liquid. People began melting pennies for copper and profit. Encourage all the students to redesign their boats so that each one can hold more pennies. The purpose of the experiment is to test the cohesion and surface tension properties of the penny and solution. 4-1. You will then graph the data, calculate the slope of the lines, and determine the density of the pennies. Make sure to write your name, your lab TF's name, and your lab time at the top of your paper. Calculate the volume (m 3) and density of the object and record this in your lab report. Activity 2: Penny Statistics Modified 10. 1 grams before 1982, but a penny after 1982 weighs 2. objects 2. Ifexactly*0. = graphs & inferences. Does the mass of a penny increase or decrease as it Determining if a penny is pure copper by measuring its density. EXCEL 2007: How to CHART & add a TRENDLINE. Then graph the results to find an average May 16, 2014 · You are given a cube of pure copper. EXCEL will now graph your data. post-1984 penny. This was determined by iodometric titration analysis. The graph will then be used to determine the density of the sucrose solution. 5 g cm-3 0 50 100 150 200 250 300 350 400 450 0 20 40 60 80 100 120 Volume (cm 3) Mass (g) three different designs, make a hypothesis about your design and graph the results of your experiment. 96 g/cm 3. Determine the densities of pre-1982 and post-1982 pennies by graphing. Then measure the mass of 100 pennies. 66g/mL. Part II: Accurate Measurement Lab Materials: Earth Science (Core) 2 of 4 Exploring Orbits Semester 1: 2. Even if penny, cork, nail, rock, wood, golf ball, ping pong ball, pencil Identify the variables that you are going to plot, and decide which axis you want to plot each variable. Density can range from 7. Note that we will assume that the penny is perfectly cylindrical (although this is not strictly correct). They calculate the amount of copper and zinc in the penny by performing a chemical reaction on the penny with hydrochloric acid. Materials: 25 pre-1982 pennies 50 mL graduated cylinder 25 post-1982 pennies Balance Procedure: Work with one set of pennies at a time!!! 1. Based on the equation, density and volume density of pennies. Collecting Mass and Volume Data: Work with one set of pennies at a time, either pre-1982 pennies or post-1983 pennies. They write a balanced equation for the chemical reaction they performed with the penny and hydrochloric acid. Use a scatter plot to make the graph. 00% zinc by mass. Mar 28, 2020 · Science experiments with things found in your purse or pocket? It sounds like a great indoor activity for the kiddos! How many drops fit on a penny?Explore surface tension of water when you try this fun penny lab with the kids. 7 LPChem1415 Mass & Volume: Penny Lab In order to make a graph, I'll need to find the volume for each number of of density. The pre-1982 pennies had a density of 7. 25 grams per cubic centimeter. 1. Record the mint date of each penny in Although many factors determine the value of a coin, you can quickly determine the value of your penny by knowing the date, mint mark, and grade. 2. what type of slope did you look for to determine your answer? 1c. In this project, you will put droplets of water on a penny, like in Figure 1. 19 Sep 2016 A fun experiment is to have students find the mass and volume of different numbers of pennies ( which vary in mass density) . Clark Chemistry. S. Minimize your browser, double click My Computer, double click the shared drive called colwell/bay on Lederman, double click your period's folder and then finally double click 1-density. Slide 1 of 1. The phenomenon In 1982, the density of pennies changed. Materials: electronic balance. Hold your dropper about ½ inch above the penny at a steep angle and slowly add drops of water to the surface of the penny until it overflows--count this as any time the water goes off of the edge. 31 Aug 2011 Penny Density Lab 001. Experiment 8: Penny Statistics CH2250: Techniques in Laboratory Chemistry, Plymouth State University Adapted from "4. The higher the surface tension of the water, the bigger a droplet you can make before it breaks and flows over the edges of the penny. Density is the mass divided by the volume of the object. Draw a line from (0,0) through each point, extending the lines to ends of axes. Set up a graph. penny density Scientific Method Measurement Unit Conversions Lab graphing lesson Tuesday January 18 Measurement Density Lab Challenge Metrics Practice WS (2) Drops on a Penny lab Introduction - I pass out the lab materials and safety goggles. A penny containing more of a certain metal than another penny will have a different mass, because its density is different. 23 Jan 2012 and Mathematics Online collection: This video deals with the measurement of pre 1982 and post 1983 pennies, demonstr Density of Pennies We did this lab on my chem class. Based on their density, determine the metals used in pre-1982 and post-1982 pennies. Remember to follow the Graphing Guidelines. 4 through 1. That is, you will perform a test of how two variables might be related. Complete "mini-unit" - Zip file with Density of penny lab, PowerPoint presentation that goes along with the lab, a spreadsheet to graph the class data from the lab and a short quiz to give students after the lab is over. What is the density of the material you tested? D Using your knowledge a. The cleaning action will be visible for several seconds. Remove the penny from the liquid. A useful hypothesis is a testable statement which may include a prediction. Matteo Camacho-Bier Sam Guest Properties of Metals vs Non-Metals Lab Activity Objectives: Distinguish the differences between metals and non-metals based on their physical properties such as melting temperature, density, thermal conductivity, and electrical conductivity Part 1: Thermal Cond In the case of the Coin Drop activity, the penny is at rest sitting on top of the card. Sep 02, 2016 · In today’s lab, you will determine whether or not there are more than one kind of U. They are possibly made from copper because the density of copper is 8. As you learned from the “Hollow Penny” activity, pennies minted before 1982 are pure copper. Complete the pre-lab assignment at the end of this handout. Click on the graph legends are (right of the graph) and delete it. Plot the data for the post-1983 pennies and draw a best-fit straight line that goes through the point (0,0). Each group will pick 20 pennies out of the pool. This Penny Lab Worksheet is suitable for 10th - 12th Grade. Density Lab-Day 2-create penny graph; Data table preparation for water (Volume of water, mass beaker, mass beaker + water, mass of water, density) Begin density Lab-Day2-Liquid density data (15, 30, 45, 60, 80 mL) HW: Finish graph of penny data. Separate pennies by years. 5g/ml. The Liquid Volume. 3. Experimentally, mass and volume measurements are required to calculate In a modern physics textbook, the mass of a penny was used as part of a word problem. 7. Label the x-axis as “Shape of Boat” Nov 21, 2015 · Density is the amount of mass acting per unit volume of a substance. 1 . Data Table 1 Trial Mass of 10 pennies made before 1982 Mass of 10 pennies made after 1982 1 123. 65 g and a volume of 0. Use the proper units and sig. Your graph includes data for five objects. The relationship between a substance’s mass and volume is called its density. California Science Content Standards: • 2. 2. Density is a physical property. You are testing variables. Lab Report 1: Using Pennies and Good Sense. Print out a copy of the graph to include in your lab report. In an object composed of multiple materials (like a penny), the density is a weighted average of the densities of the pure substances that make up the object. This is a 10. The slope obtained for the graph is equivalent to the molar absorptivity since the cuvette had a pathlength of 1 cm. 8125 drop decrease due to . Remove any stuck pieces of zinc powder from the penny. Answer to determine the math, 2007 if i was soi fun chemistry with research and study guides. Proceed to 'Instant Verdigris!' Lab Report on Density Measurement 2158 Words | 9 Pages. The Task 1. Rip a small chunk off the paper that is big enough for the penny to sit on. 3 Lab Data worksheet 2. Procedure. Add a regression lines to each series in the plot. Density Lab Today’s penny is quite different from the penny a decade ago. Finish collecting penny data. Students examine pre-1982 and post 1982 pennies and calculate their densities. Density, an intensive (or intrinsic) property, is a kind of "heaviness" factor. Measuring the density and volume of a single penny can be challenging. We are always on the hunt for simple science experiments and this one is just super fun and easy! HOW MANY DROPS CAN FIT ON A PENNY? DROPS OF WATER ON A PENNY Get ready density of copper with the value for the slope of the line for the pre-1982 pennies. The United States Mint has made four different types of small cents: Flying Eagle Penny (1856-1858) Values. As a result of this change, the density of the penny also changed. Laboratory is a very important component of any science class. This slope corresponds to the density vs. place ( 0. 0 g/cm3). Density and Pennies. Analyzing and Predicting from the Graph. Graph your data sets. volume graph. Density is a basic physical property of a homogeneous substance; it is an intensive property, which means it depends only on the substance's composition and does not vary with size or amount. 5 / PH: Investigation 23 • 3 sheets of paper • Heavy corrugated cardboard • 2 pushpins • Metric ruler • String, 30 cm long • 5 colored pencils • Cellophane tape • Calculator How Does Temperature Affect Water Density? Nuclear Penny Lab. Lab Chem-271 Density Pre-lab Discussion Chemistry is the study of matter, which usually is defined as anything that has mass and volume. 78 grams/cm 3. If an object has less mass in more space compared to water, it has less density and will float. We calculated the densities of the older and newer pennies by graphing our obtained values on a mass (g) vs. In your classroom work in chemistry, you will learn a great deal of the information that has been gathered by scientists about matter. 6 percent zinc. Provide a graph of mass vs. Balance Pennies. The Slope is the average Density. 0 10 20 30 40 50 60 70 80 Electroplating Lab CHEM 401 . 0001 g and record the data in TABLE 1. When you flick the card out from under the penny, you allow gravity (an outside force) to act on it and drop it into the glass. Penny Lab Purpose: To compare the density of pennies minted in different years and predict their chemical composition using a chemical test. 8th Grade Lab 2. Copper and zinc are different elements and therefore have different density values. Activity. If you have a series of data, you can plot the mass vs the volume and the slope of the resultant graph will give you the density. Summarize background in own words. Weigh the penny on the analytical balance to the nearest 0. Then graph the To practice graphing the relationship between the circumference of a circle and its diameter Experiment Measurement: Length, Mass, Volume, Density, and Time Diameter (cm) Circumference (cm). The slope represents density. Periodic Trends Lab. I drew the best fit line for my data, and drew the best fit line for the points. Academic Chemistry BB density lab. You should use this in conjunction with the formal lab report packet because this does not include all parts that should be in each section! Date: Block Pre-Lab: Comparing Density PRE-LAB QUESTIONS Answer these questions on a separate sheet of paper after carefully reading the lab procedure. If the average mass of your control group (those pennies minted before 1970) is different from that of any of the variable groups, you'll know that the pennies are not made of the same amounts of the same materials. On the day of the lab 1. c. density OR volume vs. Generally, scientists will take these possible sources of error into Note that this lab involves making a graph, and it should be handed in as part of the So the penny densities were changed and their reaction to HCl changed. Surface Tension: Liquids Stick Together Teacher Version In this lab you will learn about properties of liquids, specifically cohesion, adhesion, and surface tension. This Penny Lab Lesson Plan is suitable for 10th - 12th Grade. Data table for pre- and post-1982 pennies 2 graphs: mass vs. Prepare a table to summarize the density data you collected. According to the Independent variable: This is the one you're changing in the experiment, so it's the type of solution that you're dropping on the penny. Before 1982 pennies were minted from an alloy of copper. Fill a glass, cup or small bowl with tap water. Components of density are: mass and volume, both of which can be more … The penny, being only one cent, is literally not worth its weight in copper. The year the coin was minted is important to the case. C. Working. 23 Feb 2014 What must you measure in order to determine the density of a penny? of an entire experiment depends on the phase of the moon (not usually, Figure 4 shows a plot of the measured thickness of many new pennies (which The aim of this lab was to determine the metal that constitutes the post-1982 penny. 5% copper. Wet the paper towel or cotton pad with a few drops of vinegar. 0 g/cc for a very old one. Electroplating Lab . 6. D e n s i t y o f a s h i p w i t h c a r g o = m a s s o f s t e e l h u l l + m a s s o f e n c l o s e d a i r + m a s s o f c a r g o v o l u m e D e n s i t y o f a s h Hamza Aziz General Chemistry I Lab 09/12/2007 Lab 7 Density of Sprite and Diet Sprite Abstract: The density of regular Sprite was found to be 1. Copy down all class data pertaining to that metal. using the fact that Density = slope = y ÷ x (for a straight line), calculate the density of this substance: 2a. 00*mg*of*copper,*and*the*copper*concentration*is*1000* The table and graph should be used in your lab report (see below). 26. Calculate the density of the following objects by dividing mass/volume. So a coin composed of 50% gold and 50% silver would have the following density. Create a boat with each It can be inferred that the 1943 penny holds more water than the 1963 or 1984 pennies. Rinse the tongs. Read and complete the lab safety form. xls. Penny Density (g/mL = g/cm3) Density Uncertainty Average Density (g/mL = g/cm3) Standard Deviation Density (g/mL = g/cm3) Show the calculation of the density uncertainty in this space: Be sure to append and discuss a computer generated plot of mass of pennies as a function of year as a figure in your report. What metal are those pennies mostly made of? _____ Can you determine if a penny was minted before or after 1982 if you know Lab report on density In this experiment, you will use a graph to determine the density of post-1983 pennies. Start studying Lab 2: Density of Pennies. Results The absorbances of the CuSO 4 standard solutions were directly proportional to their concentrations (Table 1, Figure 1). Learn vocabulary, terms, and more with flashcards, games, and other study tools. Part 2 – Shiny to Green. But when cargo or other weight is added to the ship, its density is now defined by Equation 2 below. Electroplating . Students will ascertain when this change occured as they measure a penny from each decade. volume. 3 6. D. This lab handout! Questions: 1. Wash the pennies in the sink and dry them with a paper towel. Lab: A Penny For Your Thoughts Background Information: Density is defined as the ratio of mass to volume, and its formula is density = mass ÷ volume. Part II: Density of Pennies. a) Using a ruler, measure the diameter of a penny to the nearest mm, in units of cm. Press [GRAPH] and both the data and the line will be plotted. Determine the mass of the 2 groups of coins and record it on the data table. 4. Record the mass in the appropriate data table below. Make sure it is on heads--using tails will give different results! 3. volume (mL) graph, giving us the density. Mass & Volume Lab 4 Part E: Find the density of the solids and liquids 1. This difference causes the pennies to have different density values. In 1982, both the heavier brass coins and the lighter zinc coins were made. 3 Lab Analysis Questions complete. Dividing 1,000 by 1,000 gives the water’s density, 1 g/cc. By comparing the densities of pennies minted before 1982 and after 1983, we will demonstrate that the composition of these pennies is different. In this lab you will be electroplating zinc onto a penny, copper onto a nickel, and calculating the number of moles of each metal deposited onto the coins. Split your group in half so each person has a partner. Objective . Paste your graph into your word document lab report. INTRODUCTION 1. Pennies made before 1982 are made of 95. 6% zinc and 2. They are possibly made from zinc because the density of zinc is 7. Plot the pre-1983 data and post-1982 data as two separate series. Dependent variable: This is the one that you're measuring. What is the density of the pennies 2. 42 g 2 123. The lab must be completed in conjunction Updated 2018 – Spreadsheet that will graph 20 trials, along with the Density of Water. Clark Chemistry? Cancel Unsubscribe. 92 g/cm 3 and the density of zinc is 7. Procedure: Part 1 1. Click on the entire graph and from the Edit menu choose Copy. Note: In the lab, 2 taster spoons of salt were required for the blue beads to float, 6 additional taster Sep 19, 2016 · Density is Mass over Volume # D = (M/V)# Slope = #(y/x)# So if you graph Mass = y and Volume = x . To determine if density is an intensive or extensive property of matter. The ship floats because its density is less than the density of water. Since then they have been made with an outside coating of copper and an inside core of a different metal. Unlike Part C, the beaker should not be tared or emptied before adding more solution. Questions: 1. year minted. Density is mass/volume or is the rise over run or y/x. There was a 3. Figure 2a: Column Graph Figure 2b: Bar Graph The vinegar on the paper towel helps the copper in the penny easily react with the oxygen in the air to form a blue-green colored compound called malachite. pennies minted after 1982 have a Zn core with a Cu over layer. were to be measured, then the outcome of the density would be 5. Intensive or Extensive Property? Purpose. With a ruler, carefully measure the thickness and the diameter of the penny to the nearest 0. 90 ± 0. In 1982, the U. 2013 1 2 Activity: Penny Statistics1 Due Sept 4th, 2015 U. for lab report: 1. These principles will be demonstrated by adding drops of different liquids to pennies to determine the strength of molecular attraction. Science Department's Site. In this experiment, you will measure volumes of different materials, using direct and indirect methods. graph. Name: _____ During the late 1970s and early 1980s the value of the copper in a penny became greater than 1 cent. of the penny at this time because of an increase in the price of copper. Density = mass of substance (g)/volume of substance (mL) In this lab, you will determine and compare the density of two sets of pennies by graphing mass vs. Set a hot plate to a setting of about 7 (for model Thermolyne Cimerac, or ~180°F). Record your individual lab station data on the “Class Data Table. density = By rearranging we get: mass of substance = density × volume of substance . The bottom of the glass stops the penny This material is created and submitted by individual authors as recommended lesson plans to incorporate engineering design challenges and to review key science concepts. Lab - Penny Density. What would be the density of an object with a mass of 1. Consult with your lab instructor if the program does not produce valid solutions with your data. Write your answers to the pre-lab questions on a separate sheet of paper. 5 grams. For the Drops on a Penny lab experiment, testers use an eyedropper to drop single drops of water onto a penny, and they count how many drops can fit on the surface before spilling over. 4% copper. compared to Diet Sprite which was 0. Indian Head Penny (1859-1909) Values. Determine the a) Choose one of the circular objects in the lab. 3g/ml. My lab group and I added pennies each time, recording data and made a graph of how the volume increased each time. The density of copper is 8. Be sure to title your graph and label the X and Y axes, variables, and units. ! Draw a rough representation of the graph on the board, making sure to label the x and y axes. 3 Lab Procedure 2. (The lid keeps the vinegar from drying out. ) and heavier coins. Students must first perform a control test with the plain penny before coating the penny in the testing liquid (soap). We discuss the directions and safety rules that relate to this experiment (see list below). The key word is testable. Density is the amount of matter contained in a specific volume. But, chemistry is not just information. Practice accurate measurement of mass. The slope of a mass vs volume graph represents the density of an object, By determining the density of each type of pennies, the composition of the metal can be confirmed. Set Up. You can do this most accurately by placing 10 pennies side by side, measuring the total distance and dividing by 10. Periodic Table Intro Lab. III. mass percent of the solution, fitting a linear equation, y = mx + b (Figure 1). A forensics technician claims she can determine if the coin was minted before 1982 without altering the coin in any way. Calculate the density of the unknown sample solution by obtaining the mass of the specific volume of May 26, 2016 · This is because corn syrup has the highest density of all the liquids, about 1. dashed). This lab handout. Measurement by more than one method reduces bias and systematic errors in answers that are found in common. A Penny for Your Thoughts: Scientific Measurements and Introduction to Excel Pre-lab Assignment: Reading: 1. Construct a graph of your results so that the slope of the line equals density. Introduction: Paragraph form. 8. 5% zinc, 2. Chemistry “A Penny for Your Thoughts Lab (Alloys)” Background Information Pre-1982 pennies are composed of pure copper. Therefore, post-1982 pennies are 97. Record your observations of this penny. The experiment show that the acidic water decreases the amount of drops which can fit on a penny before the water's surface tension is broken. Wheat Penny (1909-1958) Values. http 2 Welcome to Integrated Physics and Chemistry Lab at LUOA. Using a Determining if a penny is pure copper by measuring its density. The accepted density of post-1982 pennies is 7. It cost the government more money to mint pennies than their value. Be sure to title it. The Objectives of this lab are: · revise a hypothesis · accurately gather and record data relevant to the hypothesis · analyze the data graphically · develop an explanation for your results Part 2 Why do you think the mass of a penny varies the way it did in your previous investigation? Write down your hypothesis. 6 percent zinc and 2. Aug 29, 2017 · How to Make an Excel Graph for the Pennies Lab - Duration: 4:24. Include purpose - The purpose of this lab is to measure volume and mass for pre and post 1983 pennies, graph this data, and determine the two densities by graphing methods. 5% zinc and 2. This is the density of the respective pennies. The post-1982 pennies had a density of 8. minted since 1983? Compare the slope of the line for these pennies with the density listed for each element on pages xxii—xxiv of this laboratory manual. Dunkin’ for Density 2018. Fill the medicine dropper with water. Lesson 2 The Nitty Gritty of Density by Teresa Kennedy Page 14-16 Density Station Data Sheet Page 17 Liquid Layers Lab Sheet Page 18 Lesson 3 Wet goes up, must come down by Cory Patterson Page 19-21 Wet goes up must come down lab data sheet Page 22 Lesson 4 Density is in the Air by Tiffany, Teresa and Cory Page 23-26 Ocean Water Density Lab Introduction Density depends on mass and volume. Things that reduce surface tension are called surfactants. 18 mL? 2. Estimation of Density Using a Graph Materials: 32 Density Graphs ! Hand out the Density Graph to each pair of students. Find the slope of the line formed on your graph. When you calculate the density using your measurements, you get 8. What is the independent variable, the dependent Introduction: According to Beer’s Law, A=Ebc, under ideal conditions, a substance’s concentration and its absorbance are directly proportional: a high-concentration solution absorbs more light, and solution of lower concentration absorbs less light. 0 mL water 100. Which SUBSTANCE has the lower density? Experiment 3 Introduction to Density INTRODUCTION The purpose of this experiment is to understand the meaning and significance of the density of a substance. 0% copper and 5. Density from Slope of Graph - Duration: Penny Lab - Duration: 2:25. Hi, Margot. Which elements have a density similar to your results? 3. Throw the filters sideways so there is more time to fall and capture the motion on video. Show work. SNEAK PEAK inside … Advance Preparation. 5-gram penny would be 1. Penny Statistics," Experiments To Accompany Exploring Chemical Analysis, 4th Edition, Daniel C. Important chemical properties are density and hydrophobicity, as they determine the best way to remediate contaminated sites. As we know, different liquids have different densities and owing to this property, when you take different liquids of same quantity and mix them together, the liquids with higher density will sink below the liquids with lower density. This is when you are doing a real experiment. The three liquids are water, rubbing alcohol, and vegetable oil; because of their different surface tensions, more water can be piled on top of a penny than either of the other two liquids. In this lab, the team analyzed penny masses to determine trends between the masses, the years there were minted in, and the causes of these trends. The units for mass are grams (g). 5th-graders' science experiment involves a penny and drops of water. Label the axis well and make it look pretty. The Penny Lab answer? Wiki User 2008-09-10 18:05:13. For an object made of two metals the density of the is given by: Object density = A (1st density) + B (2nd density) Where A and B are coefficient between 0 and 1 which represent the percentage of each metal. Graph each of the groups of pennies on the same graph using some type of different lines. 6 in Brown, LeMay, Bursten, and Murphy. I don't think there is any way to get from atomic weight to density without the almost impenetrable math of nuclear physics and quantum dynamics, but the density of copper is 8. What's Going On? Why does the penny sink in the water? Density is Lab 1: Measuring Density. Density of post-1982 penny = 7. One of the pennies was pre-1982 while the other was post 1982. Using this information, explain, IN WORDS, why a penny made before 1982 will have a greater mass than a penny made Density Column Lab — Part 1 Worksheet To improve groundwater quality, it is vital to for environmental engineers to know all of the physical and chemical properties of the contaminants. If the density of pure copper is d Cu and the density of pure zinc is d chem LAB: DENSITY OF A PENNY Purpose: Determine the densities of pennies which date from 1983 and later and of pennies from 1981 and earlier. Purpose: Change the density of the film canister so that 97-99% of the canister is suspending under water (very SLOWLY floating from the bottom to the top of the tank). Using the average penny density that you determined experimentally, and the equation for the line in your graph, determine the % composition of Cu and Zn in the penny. What is your percent error? experimental value = 8. You measure the sides of the cube to find the volume and weigh it to find its mass. worried about his lab grade and is concerned that if Graph your results (THINK …what type of graph would be most appropriate?) LAB: DENSITY OF A PENNY. 25 molar sulfuric acid mixture with a pH of 2. In this penny lab, students determine the percent composition of a penny produced after 1982. One person from each pair will, using the pipette, count the number of drops of tap water that can place on the head of your penny before the water spills over the side. 78 g/cm 3. Penny Set B was minted after 1982. Use a dropper to place as many drops of water on the penny (ONE AT A TIME) until ANY amount of water runs over the edge of the penny. Along with that information, I found a website that discussed the composition, mass, and density of a penny. Watch it as long as you like but, on it’s own, the penny will not move from that spot. Now carefully Two page lab where students calculate the density of a penny. In this lab, you will measure the mass and volume of two sets of pennies: pre-1982 pennies and 1982 and later pennies. 1 g/cm 3, so the 1983 and newed plated pennies are significantly lighter than pre-1982 pennies. Please see attached lab. 14g/ml. d. Mint changed the composition of pennies. ( 2 colors, solid vs. To obtain the graphs shown below, three pennies from each year 1-10 (penny #1, penny #2, and penny #3) were weighed. Newer pennies are actually almost entirely composed of zinc, but the thin coating of copper on the outside makes new pennies look very much like they are made of copper. Procedures Mar 26, 2011 · Measuring the density A coin density is the ratio between the coin's weight and the weight of the same volume of water. 4% decrease from the baseline. Density pre-1982 pennies: _____ g/cm3 Density post-1983 pennies: _____ g/cm3 4. Draw a line of best fit for the data shown on the right. 38 m/s. Your lab report should include the experimental and actual values. 43 g Penny Density Lab: Formal Lab Report Support Sheet *WARNING: This sheet is designed to help students avoid common mistakes and errors when writing the formal lab report for the Penny Density Lab. Background related to this mass measurement lab: As the material utilized to make pennies was cheapened from mostly copper to mostly zinc in 1962, the mass of a penny decreased. Find the mass of 5 pennies. 5. Since concentration and absorbance are proportional, Beer’s Law makes it possible to determine an unknown concentration of phosphate after Mar 27, 2014 · The Determination of Copper in Pennies By: Brooke Carmack Abstract: The percent composition of copper was analyzed for both pre and post 1982 pennies. Step1: Determine the density of water based on the laboratory temperature using. The mass was figured out and two tests of volume were performed. Chem 125 Penny Lab Report Purpose and Hypothesis: The purpose of this experiment was to find if the composition of a post- 1962 penny has remained. Pennies dated 1982-present: Composition: 97. Let the Y-AXIS reflect the mass of the pennies. MATERIALS 5 pennies of varying mint dates balance sensitive to 0. Family Plot Recommended for you. ) Today’s penny is quite different from the penny of a few decades ago. You can start an analysis and conclusion like we practiced yesterday. Furthermore, the current penny is often referred to as a “Zincoln”. State your final value for the density and its uncertainty in the standard form in your report. on a seperate sheet of paper Density Lab Materials: One 25, one 50, and one 100ml graduated cylinder Tray with samples of: aluminum, steel, lead, zinc, copper, brass and at least pennies Beaker of salt water Procedural information: When measuring mass of a metal sample, make sure the metal is dry before massing Start studying Chemistry Lab: Density and Specific Gravity (quiz 2). What must you measure in order to determine the density of a penny? Since the density is the amount of mass per volume, and the volume of a penny can be determined (approximately) from the thickness and diameter, it follows that measurements of the mass, the thickness and the diameter of the penny should be enough to calculate the density. M= y2 – y1 __ X2 –x1 . The density of an object can be determined from the mass and volume of that object. Properties of Pennies part 2 . 01. 92g/ml. Defined by the Greek letter ρ, read as rho, density is a basic yet important physical property of matter. Put one penny on the wet pad and cover with the lid. Bring this handout. 08 g 101. Prior to 1982, pennies were made of brass, with a uniform composition (95 wt % Cu / 5 wt % Zn). ANALYSIS QUESTIONS: Use the graph provided to answer the following. Use the proper units! object mass volume density = mass volume Coin (penny/dime/ nickel) paper clip metal slab (green/silver) small metal cube (1 or 2) marble 15. Penny Density Lab Date:_____Hour:_____ General Chemistry Page 4 Pre-Lab: _____ Analysis: Answer the following questions, showing work where indicated. ONLINE PERIODIC TABLE & TRENDS PRACTICE TEST Friday, Aug 29 * I can measure and calculate density. Laboratory Manual Chemistry: Matter and Change vii How to Use This Laboratory Manual Chemistry is the science of matter, its properties, and changes. 9965 +/- g/mL. tap In this lesson and its associated activity, students conduct a simple test to determine how many drops of each of three liquids can be placed on a penny before spilling over. 3 Density of Irregular. This was performed due to the change in the amount of copper This means you need to reduce the surface tension of water. Asked in The Beatles What hero has a Lab mix named Penny Lane? Hayden Panettiere has a lab mix named Penny Lane. Org 1 mb; penny what drugs are always at powell library penny r. Having performed this lab, a student suggests that the terminal velocity of a 2. 1a. Place a line on the graph, which represents the density of water (1. Why do you think pre-1982 and post-1983 pennies have different densities? How is their “chemistry” different? 5. figs. 6 in your course text. In a mass versus volume graph, mass is on The most common reasons for density errors include using the wrong or inaccurate instruments and not accounting for temperature changes. Let's review. Unfortunately, not all of Density (\ (\rho\)) is a physical property found by dividing the mass of an object by its volume. Construct a graph of your results so that the slope of the line equals density. 2500*gramof*copper*was*used,*then*1. This is similar to why the Statue of Liberty (which is covered with a layer of copper) has turned greenish-blue. Related Questions. Remember, density = slope = (y2-y1) (x2-x1) Compare the density you obtained for the post-1982 pennies to the density chart on page 1. Obtain two pennies, two pipettes, and a beaker with 200ml of tap water. Then, in 1982 the Mint introduced a penny that is 97. Calculate the possible errors for density (kg/m 3), showing all your steps. 1952 – 1981, 1982 – 2009. What is the density of an object with a mass of 1. Eeo public file report period: penny best natural food for lodging entertainment comics. Pre-Lab Assignment 1. There are many different instruments you can use to measure liquid volume such as kitchen measuring cups, beakers, graduated cylinders and volumetric pipettes. † Interpret class data to determine approximately when the composition of pennies changed. The mass measurements had 4 significant figures. From the graph, predict the total mass for 100 pennies. Have one person in your group collect aluminum foil, a ruler, scissors, pennies, a container half-filled with water and graph paper. 87 g/mL . Plot the density values against the percentage by mass of the standard solutions and determine the slope of the line. After constructing a graph, the graph showed that the density of the pre 1982 pennies Density is defined as the ratio of a substance’s mass to the volume it occupies. unknown was diluted in a 1:1 ratio with DI water, and the absorbance was measured again. 037 +/- g/mL. Data Table: Group/Boat Name Number of Pennies Held Shape of boat Make a vertical bar graph to analyze the class data. Virtual lab sheet Click Here lab - schoolworld an experiment drop drop onto a playlist. 4 grams per cubic centimeter whereas the density of water is about one gram per cubic centimeter at room temperature. Dip a penny halfway into the liquid and hold it there for 10-20 seconds. Which SUBSTANCE has a greater density? 1b. They graph and answer questions about density and composition of the two different age pennies. Treasury was losing money in the production of pennies. The new penny is made of a metal composition of 97. 15 minutes offering answers to CAUTION: Never put lab supplies into your mouth. Let the X-AXIS reflect the volume of the pennies. Penny Density Lab Required sections: Header Title Purpose Procedure Data Graph Calculations Questions Conclusion Background Information: Pennies minted before 1982 are composed of 95 percent copper and 5 percent zinc. The density of zinc is 7. 18 g/cm On ONE sheet of graph paper, plot mass (y-axis) vs volume (x-axis) data for both sets of pennies. To learn If you have a series of data, you can plot the mass vs the volume and the slope of the. Penny Density Comments (-1) Percent Composition of Salt in Saltwater Lab - Ammonium chloride solubility graph Oct 28, 2009 · 1. Now, use your graph to predict the mass of six objects. After recording all measurements for the spheres, select the Graph of Data for Cylinders tab. However, this is not the main two pennies (one for each lab partner) and place them directly into the beaker of water. Formal Lab Report Write up due! Chemthink--THE ATOM; Atomic Strucutre, Isotopes, & ONLINE ATOM PRACTICE TEST. 15 g/cc for a new penny versus 9. Objectives: 1. 3m answer views. Results by Melissa. Density of Pennies Lab . 1 Background of the Experiment Mass density describes how heavy an object is. 01 g 50-mL graduated cylinder having 1-mL graduations SAFETY PRECAUTIONS PROCEDURE 1. Electroplating involves the deposition of a metal onto an object composed of a different metal. Lab Station 1: Drowning Lincoln 1. Measuring Device. The volume measurements had 1 significant figure. 4 percent copper. In this activity, you will determine if salt water is denser or lighter than fresh water. Don’t use soap, but use water and a towel to clean and dry off your penny. accepted value = 8. Some of the words in this lab may be new to you. Calculate the density of gold using the slope of this line. Make a list of any new vocabulary and their definitions. Your challenge: Determine, empirically, the density of pennies before and after 1982. Inferences: Analysis (Use graph paper!!) (Use graph paper!!) Pg 5. Background: Density is mass per unit volume (D = M / V). Come on time to room 301. SCS21__-31___ Date_10/21/13__ EXPERIMENT 2B: DENSITY OF A PENNY Equipment: triple beam balance, graduated cylinder, meter sticks/tape measures In the experiment, he determines the mass of a penny and then drops it into a. Note: maximize the size of your graph Make a graph with the mass on the vertical axis and volume on the horizontal. Record the mass and year of each penny in your lab notebook. This merges the word zinc with Lincoln since pennies today are called Lincoln cents. Background . This is a great way of determining Density. Determine the mass of 5 pennies from one set using centigram balance. You can calculate density by dividing the mass of a substance by the volume. 1 mm. The units for volume are either cubic centimeters (cm3) or milliliters (mL), so the units for density can either be g/cm3 or g/mL. Jan 23, 2012 · Part of North Carolina School of Science and Mathematics Online collection: This video deals with the measurement of pre 1982 and post 1983 pennies, demonstr density of pennies. No Work = No Credit! 1. Objectives 1. In macroscopic terms, density reflects how much mass is packed into a given three-dimensional space. Sample Traditional Lab Report - Density of Pennies Hypothesis (Based on the instructions provided) The density of pennies made before 1982 will be greater than the density of pennies made after 1982. Once the water has reached the edge, you begin to see a bubble or dome of water forming on top of the penny. Density of Pennies Lab Objectives: To determine density. Regardless of the sample size, density is always constant. Cut three (or more, if you have time) 16-cm-square pieces of foil. Pennies made after 1982 are made of mostly zinc with a thin copper coating. ” Choose one of your unknown metals to graph. For example, the density of a pure sample of tungsten is always 19. The bubble shape is a result of the water molecules clinging to one another in an optimal shape (just like Construct a graph of your results so that the slope of the line equals density. In the experiment you determined the mass of a stack of ten pennies, the volume of a stack of ten pennies and the density of a stack of Prepare a graph of density versus year. Extrapolate the line on the graph so that it curves and flattens out to a terminal velocity. Are they close? Should they be? What does the slope of a mass vs. Good lab for middle school science but also good for the beginn 2) Calculate the density of each metal by DENSITY = MASS / VOLUME. This ratio varies from one metal to another and its calculation is more accurate when dealing with pure metals (silver, gold, zinc, etc. Penny. During 1982, the rising cost of copper caused a penny to cost more than 1¢ to make & the U. One ICLEAR strategy I used to complete Experiment 2B: Density of a Penny. 5 Jun 2019 Density and percent composition are important concepts in chemistry. Number of Drops – Raw Data Trial 1 1943 Penny 1963 Penny 1984 Penny 43 22 33 Number of Drops – Raw Data Trial 2 1943 Penny 1963 Penny 1984 Penny 45 23 37 lab report for this experiment. (The dry paper underneath Jan 31, 2020 · Penny Change Experiment Instructions. For example, container of water weighs 1,000 grams, and it takes up 1,000 cc. You will most likely be asked to open the file as "read only" - that is fine. You will record the masses of pennies, perform statistical analysis on the raw data, and draw conclusions based on those analyses. Loading Unsubscribe from Tom C. Please do not attach these to your notebook until after they have been graded and returned to you. 25 pre-1982 pennies. minted penny based on the mass of the pennies. So take 20 Answered Aug 23, 2018 · Author has 4k answers and 7. Purpose: The purpose of this lab is to accurately determine the densities of pre-1982 and post-1982 pennies. To use density to determine an unknown metal. Materials List: Graduated Cylinder Water. 0 Introduction: In this experiment, two pennies were analyzed. volume graph represent? The average density values are equal to that of the slope because they should be the same. 00*mL*of*your*standard* solution*will*contain*1. 29 Mar 2016 If you plan on doing this mini-experiment with multiple classes, pennies are made of zinc with copper plating, their densities should vary . After 1983, the US Mint changed the composition of the penny to be 97. From the graph, determine the densities of the pre- and post-1982 pennies. Lab 1 - Penny Lab: Abstract The penny lab that was done to find if the density of a post 1982 penny from the U. Density of Germanium Lab. 07 g 101. 0 mL water Density Lab . The Density Lab program is designed to calculate the volume and density of the brass cylinders using your data. This means that whether you have one gram or one kilogram of the sample, the density will In this lab, you will determine and compare the density of two sets of pennies by graphing mass vs. Unless otherwise stated, answers should be in g/mL or the equivalent g/cm3. I used the same penny and dropper through the experiment . It gave the mass of a penny to be 3. Density is a measure of how much mass or weight an object has divided by the volume it takes up. Leave the pennies in the liquid for 5 minutes. Before 1982, pennies were made of copper. Data: In your lab book, create a data table like the one below and record how many pennies each boat in your lab group holds before sinking. Density of pre-1982 penny = 8. Clean Up. From this data you will estimate the percentages of copper (Cu) and zinc (Zn) in pennies. 0001 g). 50 mL plastic graduated cylinder. Put the penny on it. A hypothesis is a tentative statement that proposes a possible explanation to some phenomenon or event. for homework if not done in class Graph Paper for Penny Lab. 96g/mL. 1 grams. Carefully follow the procedure and collect data in an organized table. Compare your average density value to the slope of your mass vs. Sketch the graph on your report sheet. 0 mL water 53. So i had to do a lab this week where we had to see how much distilled water,deterhent solution, sodium carbonate solution, and sodium chloride solution would fit on the surface of a penny. Equipment: Materials:_____ Here’s a good template for your conclusion for your penny lab: I measured 30 old (pre-1982) US pennies mass and volume and plotted that data on a graph. I. A fun experiment is to have students find the mass and volume of different numbers of pennies ( which vary in mass density) . Describe the laboratory tools/instruments used in this lab. You also will use the relationship between the mass and volume of a substance to find its density. In all these activities will take about a day and a half to two days to do. volume AND either Mass vs. Use Density to Date A Coin A penny that has had its date scratched off is found at a crime scene. In your notebook (or piece of paper) write two hypotheses. Aims. Density Lab Name: _____ During the late 1970s and early 1980s the value of the copper in a penny became greater than 1 cent. For this percent composition worksheet, learners carry out an experiment to determine the percent of zinc in a penny. 25 1982 and older pennies. Materials: Film canisters with secure lids – one per student Graph your data using the mass as the dependent variable and volume as the independent variable. Electron Density Lab. docx What students are saying As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students. Does the mass of a penny increase or decrease as it circulates? Is the Apr 10, 2008 · water drops on penny lab? ok. b. Tom C. Copper’s accepted density is 8. 7th Grade Density Density PPT. Calculate the slope of the line. density With a sentence describing each graph. Fold a paper towel or cotton pad to fit the bottom of your container with a lid. Slope = Density = 3. Salt has a different density than water, so salt in the ocean affects seawater’s density. Purpose: In this lab, you will calculate the density of sets of pennies minted before 1982 and after 1983 to identify which Graph Penny lab results - complete. 19 g/mL . Jun 25, 2015 · Place your penny on a flat, level surface that can get a little wet, such as a kitchen counter. penny density lab graph

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