Types of Chemical Reactions Lab
Instructions: Follow instructions below recording observations and answering questions.
At this point each of you should be posing questions that you need answered.
1. Place a stone of marble (CaCO3) into a test tube. Pour approximately 1 ml of HCl(aq)
over it (approximately the depth of 2 fingers). When complete, pour into sink all liquid
and place the solid in garbage can.
a. What type reaction is this
b. Write and balance this equation.
c. What do you observe?
d. Does your observation match your reaction in part b? Explain.
e. Student Question:
2. Place a small piece of zinc metal into a test tube. Add about 2 mL of HCl(aq) to the
test tube (about 2 fingers deep) When complete, pour into sink all liquid and place the
solid in garbage can.
a. What type reaction is this?
b. Write and balance this equation.
c. What do you observe?
d. Does your observation match your reaction in part b? Explain.
e. Student question:
3. Place about 1 ml of H2O2 (hydrogen peroxide) into a test tube. Add a pinch of the
catalyst manganese IV oxide). ) When complete, pour into sink all liquid and place the
solid in garbage can.
a. What type of reaction is this?
b. Write a balanced chemical equation for the reaction.
c. What do you observe?
d. Does your observation match your reaction in part “b”? Explain.
e. Student question.
4. Obtain a candle melted to a flat surface. Light the candle and place it in a bath of
water such that the water is not higher than about the middle of the candle. Place a gas
collecting bottle over the candle. Slide a glass cover over the mouth of the gas collecting
bottle sealing it. With the glass cover in place and your finger holding it firmly, shake
vigorously. Save this for Question 5.
a. What type of reaction is this?
b. Write a balanced chemical equation for this.
c. What do you observe?
d. How can you explain the observation in “c”?
5. The bottle and contents in step 4 was a reaction of the gaseous product from the
reaction and water (Hint: acid anhydride) Place a drop of indicator your sample. Place
about the same amount of water in a second gas collecting bottle and add a drop of
indicator. When complete, pour into sink all liquid and place the solid in garbage can.
a. What type of reaction is this?
b. Write a balance chemical equation for this?
c. What do you observe?
6. Place several drops of lead II nitrate into a test tube containing several drops of
potassium chromate. When complete, pour into sink all liquid and place the solid in
garbage can.
a. What type reaction is this?
b. Write a balanced chemical equation for this?
c. Briefly describe the reactants vs the products.
d. What is the driving mechanism for this reaction?
7. Burn a piece of magnesium and save the product to a beaker. Add several drops of
phenolphthalein to the flask. Phenolpthalein is an indicator of a base. When complete,
pour into sink all liquid and place the solid in garbage can.
a. What type of reaction is this?
b. Write a balanced chemical reaction for this reaction?
c. What do you observe in the flask?
d. How would you classify the product?