Chemistry in a Bag

Equipment:Calcium Chloride, Phenol Red, Sodium Bicarbonate, water,zip-lock bags, white spoon, red spoon, and two pipits.





Observations before experiments:


Calcium Chloride- chunky, solid, and has a odor


Phenol Red- red, has a strong odor


Sodium Bicarbonate- small grains, and a sweet odor





Post Lab Questions:


1. When you mixed a solid (Calcium Chloride or Sodium Bicarbonate) with a liquid (Phenol Red or water).


2. No because the temp. change was a chemical reaction.


3. The color change observed in the overall reaction was that when you mixed the Phenol Red with any of the solids it turned a yellowish color.The controlled experiments do suggest that the color change is caused when you mix the different chemicals together.


4. Ne because when the chemical reaction is occurring color, temperature and the bubbles are all the effects of the chemical reaction in this experiment, they aren't always seen occurring at the same time though.


5.The Calcium Chloride by itself, the Sodium Bicarbonate by itself, and then the two of them mixed together. No reaction occurs in the absence of water either.


6.The color change and the temperature change could suggest that a new substance was formed. The liquids and the solids mixed together could be responsible for the new substance.


7. You could mix calcium chloride and water together and then let the water evaporate to see if you are left with calcium chloride. If you are left with a different substance or no substance at all you would know that the hypothesis was incorrect.


8. No temperature change does not always indicate that a chemical reaction has occurred, because if you boil water, it is still water but just hotter.