7-7+Chemical+Changes+-+It's+In+The+Baggies

1. What must actually happen during a chemical change? - Most of the time it requires a phyicial change. 2. What are some things you can look for that might let you know if a chemical change has occurred? - Rust, ashes from a fire, and smell 1. Measure out 5 grams of Epsom salt into a baggie. 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: . 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 5 grams of baking soda into a baggie. 2. Carefully add 15 milliliters of vinegar 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: 2. In a sentence, explain why your observation would indicate a chemical change occurred. An example has been done to help you. **Table**
 * Materials:** 3 Sandwich Baggies Epsom Salt Ammonia Potato Slice 3% Hydrogen Peroxide (fresh) Baking Soda Vinegar
 * Baggie 1:**
 * Baggie 2:**
 * Baggie 3:**
 * Analysis:** 1. Look over **all** your observations. Make a list of the different types of observations on a table like the one below.
 * || **Observation:** || **Explanation:** ||
 * Example || A solid appears, not freezing || Two liquids form a solid without freezing, thus the elements must have rearranged to make a solid. ||
 * Reaction 1 || efervesent || baggie became cold once salt and amonia mixed ||
 * Reaction 2 || A potato sizzaling || If feels cold (the baggy) because the hydrogen peroxide makes the potato cold. ||
 * Reaction 3 || It was bubbling || The bag becme cold ||