7-7

__**Instructions**__
 * Chemical Changes - It's In The Baggies ** //<---Previous Assignment - Next Assignment--->media type="custom" key="6581813"//


 * ** //Make a new page on your wiki titled "7-7 Chemical Changes - It's In The Baggies."// **
 * //Copy the lab onto your wiki//
 * //Answer all questions there//

1. What must actually happen during a chemical change?
 * Prelab Questions: answer on wiki**

2. What are some things you can look for that might let you know if a chemical change has occurred?

3 Sandwich Baggies Epsom Salt Ammonia Potato Slice 3% Hydrogen Peroxide (fresh) Baking Soda Vinegar
 * Materials:**

1. Measure out 5 grams of Epsom salt into a baggie (use the used ones first, and when your done with each baggie, wash it out and put it at the front to dry). 2. Carefully add 10 milliliters of ammonia to the baggie and seal it. 3. Feel the baggie with your hands as it is reacting. 4. Record all observations on your wiki using the table below: 1. Place a potato slice into a baggie. 2. Carefully add 15 milliliters of hydrogen peroxide to the baggie and seal it. 3. Feel the baggie with your hands as it is reacting. 4. Record all observations on your wiki using the table below: 1. Measure out 15 grams of baking soda into a baggie. 2. Carefully add 15 milliliters of vinegar to the baggie and seal it QUICKLY. 3. Feel the baggie with your hands as it is reacting. 4. Record all observations on your wiki using the table below: 1. Look over **all** your observations. Make a list of the different types of observations on a table like the one below. 2. In a sentence, explain why your observation would indicate a chemical change occurred. An example has been done to help you.
 * Baggie 1:**
 * Baggie 2:**
 * Baggie 3:**
 * Analysis:**

**Table** A solid appears, not freezing || Two liquids form a solid without freezing, thus the elements must have rearranged to make a solid. ||
 * Observation:** ||
 * Explanation:** ||
 * Example ||
 * Example ||
 * Reaction 1 ||  ||   ||
 * Reaction 2 ||  ||   ||
 * Reaction 3 ||  ||   ||