Stoich Review

Stoich Review

Know the vocabulary from this unit

Answer the following questions

1. What is the molar volume of any substance at STP?

2. What is the specific temperature and pressure at STP?

3. How does Avogadro’s principle applied to gas stoichiometry?

4. How many moles are needed to react with 3 moles of zinc in the single displacement reaction with hydrochloric acid (HCl)?

b. In the same reaction, how many moles of hydrogen gas are formed?

c. In the above reaction, how many grams of zinc chloride are formed?

5. Calcium chloride reacts with oxygen

a. Write a balanced chemical equation.

b. How many liters of oxygen are used if 25.0 grams of calcium chloride are used in the reaction at STP?

c. How many grams of solid product are formed?

6. Sodium oxide reacts with carbon dioxide.

a. Write a balanced chemical equation.

b. 35 grams of sodium oxide and 24 L of carbon dioxide are available. Which reactant is the excess reactant?

c. How much excess reactant is leftover?

7. Aluminum reacts with oxygen in a synthesis reaction

a. Write a balanced chemical equation.

b. 210.0 g of Aluminum react with excess oxygen gas. How much product is formed?

c. What is the actual amount of product formed if the reaction has a percent yield of 89.0%?

8. Nickel (II) nitrate reacts with zinc

a. Write a balanced chemical equation.

b. 10.0 grams of nickel (II) nitrate react with 45 grams of zinc. What is the limiting reactant?

c. How much of the element on the product side is formed during this reaction?

d. If the student recovers only 5.60 grams of zinc nitrate, what is the percent yield in this reaction?

9. Potassium hydroxide reacts with hydrogen sulfide

a. Write a balanced chemical equation

b. 2.4 L of hydrogen sulfide gas reacts with 14.0 g of potassium hydroxide, which reactant is the limiting reactant?

c. How much excess reactant is leftover?

d. What volume of water will be formed at STP?

e. What mass of the other product will be formed?