Chemical Change Lab Report

Procedure: In this experiment, various chemicals were mixed together, to determine a reaction. Using two drops from chemical 1 and two drops of chemical two, unless otherwise stated, then recording the type of physical reaction or color changes that occurred.

A physical change includes a change in the material without affecting its composition, such as the physical state change. However, a chemical change includes the change in the composition of the substance. The change in color, formation of a gas or a solid product, and the production of energy are the evidences of a chemical reaction, thus, of a chemical change.

Obtain a 50 mL beaker for the experiment. In the first part of the experiment, you dissolve the zinc core of a penny and leave the copper covering intact by putting four notches in

Examine a piece of nichrome wire. On the data sheet, record the color and the luster of the metal. Use a forceps to hold the wire in the flame of your burner for about two minutes (recall where the hottest part of the flame is located). Describe the appearance of the wire while held in the hottest part of the flame. Allow the wire to cool and reexamine it. From your observations, determine if there was a physical or a chemical change. Give specific reasons for your conclusions. Save the nichrome wire for step #2.

Introduction :You will be exploring three scenarios and conducting observations on the physical and chemical changes in matter: The Iced Tea Debate, Salty Soup, and Fire Bug.

During this experiment, one penny stayed almost the same, while the other one turned green and completely changed. The experiments started with two cups. One was labeled water, while the other one was labeled vinegar. In each cup, paper towels were placed at the bottom. In the cup labeled vinegar, vinegar was added and in the cup labeled water, water was added. Then, one penny was placed in each cup and observed on a span of four days. On the first day, penny A (cup with water) looked the same. Penny B (cup with vinegar) had a strong smell and the penny looked shinier. Later on in the week, penny A looked a little brown but mainly stayed the same. Penny B had some bubbles, rusting, and started to become darker. Toward the end of the experiment,

In this lab we will be heating up substances and use them to galvanize pennies. When you heat up the zinc, and then coat the penny in it, it then galvanizes the penny. Meaning, it helps protect the penny from oxygen and water. Afterwards, you will need to record data such as the mass of the penny. This helps keep track of what physical traits are being changed during this experiment. On part B of this experiment, you will be heating up the now galvanized pennies in order to see what reaction you get. The reaction you should receive from heating up the now zinc-covered pennies is that the pennies will change color.

Did the coin have to be a penny? Explain. I believe that the coin didn't need to be a penny. For this journal, the same quantity of exterior area is needed so if you use pennies, cents or dimes, it does not matter if you use all same coins in the lab, the only thing that would have changed is the amount of drops.

Procedure: The procedures were you used with 20 pennies and a scale as the material. The first step we took was to get all of our material that we needed for the experiment. Second, we got one penny at a time and read off the date that the penny was made. Third, than we put the scale to zero and put the penny on the scale. Fourth, we read off the mass of the pennies and then wrote it down next to the date of it. Last step, we repeated all the steps until all 20

To start the process, I easily collected all the items I needed from my kitchen cabinet and sent my 5-year-old daughter to collect the dullest pennies she could find from her piggy bank. Once the items were all gathered together on the kitchen table, I started the experiment with both my children’s eager help.

If there are post and pre 1982 pennies in a closed container, then there are 6 pre-pennies and 4 post pennies because they are different masses and the container feels uneven. This hypothesis was incorrect because after performing our experiment we found that there were actually 8 pre-pennies and 2 post pennies.We came to this conclusion by massing all our variables and using this equation: Total Mass= (X x mass of one pre-penny )+((10-X)x mass of one post penny) . The coins were differed in their amounts of zinc and copper. Because the copper is heavier the more of it you have the heavier the coin.

The purpose of this lab is to become more familiar with the products of different types of chemical reactions by conducting several chemical reactions and observing the changes that occurred. In addition, by performing various experiments, the observations will help in writing chemical equations, which represent the process involved in a chemical reaction. Overall, the chemical changes observed throughout can determine the products that are formed from the reactants. In chemical reactions, substances that are referred to as reactants produce other substances called products. There are several ways to determine that a chemical reaction has occurred, and which type of reaction has taken place, exothermic or endothermic, which will help predict

A few more important terms to keep in mind when doing a lab with chemical and physical changes are

In this lab we were asked to observe changes and colors when mixing two or three chemicals together. The actual experiment itself used twelve different pipits and three chemicals I selected from my house. To begin, I first gathered everything, including the 96 well plate, 24 well plate, goggles, and gloves along with the observations of chemical changes bag. I set it up all on the the kitchen table that had paper towels on it. Next, I made my data table so that I could record my reactions. Third, I sat all the pipets in the 24 well plate. At this point, I began the lab by following the instructions for each chemical. I had to drop two drops of the first chemical into one well, followed by two drops of the second chemical

The purpose of the lab is to collect evidence to prove chemical change from our