Repeat. First, rub the edge of the penny on sandpaper until the silver color is exposed. Pennies are made of copper, aren’t they? Laboy Glass Penny Head Hollow Glass Stopper for 10/18 Outer Joint in Distillation Apparatus Organic Chemistry Lab Glassware (Pack of 6) Visit the LABOY Store 4.4 out of 5 stars 28 ratings Chemistry “A Penny for Your Thoughts Lab (Alloys)” Background Information Pre-1982 pennies are composed of pure copper. The purpose of this lab is to see the steps of the scientific method in action. At this point it's ready for the Bunsen burner. After 1982, however, the composition of pennies was changed to contain mostly zinc and only a small amount of copper. Students must first perform a control test with the plain penny before coating the penny in the testing liquid (soap). We will then make changes the burner height by rotating the large black knob located under the burner just above the springs. IB Chemistry Experiment 4 Composition of a Post-1983 Penny Lab Report Background: Through the use of percent composition one can easily find out how much of a certain element is in a compound or an item such as a post-1983 penny.The experiment will be using HCl a strong acid to dissolve all the zinc inside the outer copper shell. Just bend it in half – … The student does not write all of the answers to the questions in complete sentences. Repeat the procedure for Penny Set B (Post-1982). In this activity, the percentage of copper and zinc in post-1982 pennies will be determined. If they put a penny (or multiple pennies to make a bigger change) in a graduated cylinder, the change in water volume is the volume of the penny. Chemistry Lab: DENSITY OF A PENNY. Purpose of Lab: Percent yield. I did a chemistry lab in which i heated copper pennies in sodium hydroxide solution (changed the copper to "silver"), then heated it on hot plate (changed the "silver" to "gold"). post-1982 US pennies (metal composition changed in this year) muriatic acid (from a hardware store) General Chemistry Name: _____ Penny Density Lab Date:_____Hour:_____ General Chemistry Page 5 4. The modern practice of chemistry started with the study of alchemy in medieval Europe and the Middle East. In doing so, you are following a tradition that goes back to the earliest days of chemistry. In doing so, you are following a tradition that goes back to the earliest days of chemistry. Purpose: Find silver produced and compare to predicted. In addition to the missing questions/incomplete sentences, … Ask now. Lab Informal Report Name:_____ Penny Density Lab Date:_____ The Pre-Lab is due before you conduct the experiment. From Chemistry Resource. Please be sure to answer the question. The student may not have included all assigned questions (questions and answers must be included). In this lab, you will be converting a regular penny into a “gold” penny. Composition Of A Penny Lab Report. Name_Mehedi Hasan _____ SCS21__-31___ Date_10/21/13__ EXPERIMENT 2B: DENSITY OF A PENNY Equipment: triple beam balance, graduated cylinder, meter sticks/tape measures Materials: 10 pennies In this lab you will examine a few different methods for calculating the density of a penny. Making statements based on opinion; back them up with references or personal experience. Place all pennies in a 250 mL beaker containing 25 mL of muriatic acid. The NaOH dissolved the zinc. The experiment will be using HCl a strong acid to dissolve all the zinc inside the outer copper shell. This category encompasses all questions about the composition, structure, properties, and reactions of matter. The mass was figured out and two tests of volume were performed. all the volume measurements for Penny Set B. Lab Handout 19: How Much is a Penny Worth? This is an easy chemistry project that uses common materials. Write the single displacement reaction for all metals. You take a post-1982 penny, score the copper surface to expose the zinc interior, react the zinc with acid, and are left with a hollow copper penny. Modern U.S. pennies are a thin layer of copper over a core of zinc. Remember to re-zero between each measurement, as the initial signal will change as the burner position changes. Michael Ochoa‎ > ‎Chemistry‎ > ‎ Lab 1 - Penny Lab: Abstract The penny lab that was done to find if the density of a post 1982 penny from the U.S. were to be measured, then the outcome of the density would be 5.66g/mL. absorbance in your lab manual. In this video, we learn how to hollow out a penny. Pure copper metal is bright and shiny, but the oxide is dull and greenish. The cohesion and surface tension of water becomes apparent when the drops of water you add to the penny reach the penny’s edge. Katie Pietraszak - Data/Results and Experimental Introduction Knowing the value of the penny in terms of its metal content compared to the penny’s monetary value is important for the economy of the United States. Get Started FREE. Upgrade $8/mo > A conclusion question was: