Stoichiometry

Mass Stoichiometry

Name: ___________________

1. Zinc (65.38 g/mol) reacts with sulfuric acid (98.08 g/mol) to produce zinc sulfate (161.44 g/mol) and hydrogen gas (2.02 g/mol).

Zn + H₂SO₄ ZnSO₄ + H₂

a. What mass of zinc sulfate can be produced from 62 97 g of zinc?

b. What mass of zinc is needed to react with 53.25 g of sulfuric acid ?

c. What mass of hydrogen gas can be produced from 242.8 g of sulfuric acid?

2. Calcium metal (40.08 g/mol) will react with oxygen gas (32.00 g/mol) to produce calcium oxide (56.08 g/mol).

a. What mass of oxygen gas is needed to react with 25.5 g of calcium?

b. What mass of calcium oxide can be produced from 32.17 g of calcium?

c. What mass of calcium is needed to produce 140.0 g of calcium oxide?

3. Aluminum (26.98 g/mol) reacts with sulfur (32.06 g/mol) to produce aluminum sulfide (138.23 g/mol).

a. What mass of aluminum sulfide can be produced from 23.45 g of aluminum?

b. What mass of sulfur is needed to produce 82.43 g of aluminum sulfide?

c. What mass of aluminum is needed to react with 110.10 g of sulfur?

4. Potassium hydroxide is added to a solution of iron (III) chloride to produce potassium chloride and iron (III) hydroxide.

3 KOH + FeCl₃ 3 KCl + Fe(OH)₃

a. What mass of potassium hydroxide is needed to react with 120.93 g of iron (III) chloride?

b. What mass of potassium chloride can be produced from 36.27 g of iron (III) chloride?

c. What mass of iron (III) hydroxide can be produced from 40.16 g of potassium hydroxide?