The Baggie Experient

For this experiement that our class did in chemistry period 8 we mixed water, phenol red, sodium bicarbonate (Baking Soda), calcium chloride. When all of those ingredients get mixed together they made a yellow/orangeish hot mixture that made the ziplock bag expand after you stop shaking it begins to cool down and eventually get really cold. The smell of the chemical change and after effects that were going on had a paint smell to it. The amounts of how much ingredients we used was about 1 small spoon full of calcium chloride and 1 small spoon full of sodium bicarbonate. For the liquids i used about 1 pipet full for water and pipet full for phenol red.





I had to find out what was causing all these reactions to happen so i starting doing experiments with some ingredients cut out. First i did Water and Baking soda together, after that the bag did not expand and it did not heat up or change colors it just got cold. Water and Calcium chloride mixed made the bag smell like paint the bag did not expand it did not change colors but it did heat up.





After i got done with the water tests it was time for the phenol red i started with calcium chloride and phenol red. After shaking the baggie it got hotter and turned like the yellow orangish color it did not heat up. The phenol red and baking soda then cause a thick pink / purple liquid color there was no smell and the bag did not expand.





After these 4 experiments i tried everything except water and that was the key. Everything happened as the first time i was going with all ingredients except for this time it took a lot more shaking to make the bag expand so i am guessing that the water just makes the chemical reaction to speed up.

Questions :
1. Everything but water cause the reaction. Water just sped the reaction up.
2. The temperature changed when you shaked the bag it got hotter when you stop it gets cold.
3. It changed orange/ yellow sometimes when you took some chemicals out it turned purple/pinkish.
4. Yes, because tempeture goes up when the reaction occurs, in order for that to happen you have to shake the bag.
5. The absence of water makes the reaction slower.
6. Dry with dry then phenol with both.
7. Heat and gas test.
8. If you stir sugar with water that doesnt change the temperature but it is still a chemical reaction so no.