1. Introduction to Chemical Reactions
Chemical Name
Chemical Formula
Molar Mass
% Composition
Observations
Sodium Hydrogen Carbonate
Calcium Chloride
Phenol Red
Record observations as chemicals are mixed together: 1. 2. 3. 4.

2. Define the following terms:
Reactant
Product
Exothermic
Endothermic
Chemical reaction
Chemical equation
Law of Conservation of mass

3. Data Table # CaCl2 NaHCO3 Water Phenol Red Observations 1 2 3 4 5 6 78 9

4. Conclusion Questions:
1. What combination(s) of chemicals resulted in an exothermic change?
2. What combination(s) of chemicals resulted in an endothermic change?
3. Which combination(s) of chemicals resulted in physical changes?
Explain.
4. Which combination(s) of chemicals resulted in chemical changes?
5. Which combination(s) of chemicals resulted in no change?
6. Which combination(s) of chemicals produced a gas?
7. Which combination(s) of chemicals produced a color change?
8. What were the reactants in the original reaction carried out yesterday?
9. What do you think the products were in the original reaction carried out
yesterday?
10. How could we use this lab to prove the Law of Conservation of Mass?