Chemistry in a Bag

Procedure:

First we put the 1 scoop of both dry solutions into the bag. Calcium Chloride and Baking Soda (Sodium Bicarbonate) were put into one corner of the bag and sealed off. In the other corner we put one pipette of phenol red and sealed it off. We had to seperate them so they wouldn't interact before we sealed off the bag. Then we took all the air out of the bag and sealed it. Next we untwisted it and let them interact. We then observed the three chemicals as they went from their own forms of white powder and red liquid to a warm,orange color. We continued to watch as the bag began to fill up with gas and turned yellow in color. Slowly the calcium chloride and the baking soda began to dissolve and seemed to evaporate. The bag didn't explode but it did have a pillow-like structure. Next we tested some different chemicals such as phenol red with calcium chloride. We found out that when the substance becomes warm, it is because of the calcium chloride. Calcium chloride, when mixed with a liquid, turns very warm which is like the rock salt we use when the roads get icy. The phenol red when mixed with water stays a red color. Mix the two solid forms with the liquids, and the bag will fill up with gas, become warm and turn an orange-yellow color with a gassy, rotten egg odor.

1. Calcium chloride causes the temperature to turn to warm.
2. The controlled experiment without calcium chloride did not have a temperature change.
3. In the overall reaction the color changed to a orange color. In the controlled experiments we could don't find what caused the color to change.
4. The temperature changed before the gas bubbles formed.
5. All experiments required a liquid for a reaction to occur.
6. Gas is the new substance formed when all chemicals are mixed in the bag. Chemicals responsible are both the solids and water.
7. An experiment that could be tested is adding different amounts of water to see if calcium chloride's physical identity change occurs.
8. A temperature change doesn't always indicate a chemical reaction because you could see a color change or a physical change.