Mass to Mass Conversion Problems (CHEM 1405)

Balance the equations, then solve for the required substance using dimensional analysis.

1. If 20.0 g of zinc reacts with hydrochloric acid, how many grams of zinc chloride are produced?

Zn(s) + HCl(aq) ZnCl₂(aq) + H₂(g)

2. How many grams of chlorine gas must react with sodium iodide to in order to produce 17.2 g of sodium chloride?

NaI(s) + Cl₂(g) NaCl(s) + I₂(s)

3. How many grams of pure oxygen are produced in the decomposition of 5.50 grams of potassium chlorate?

KClO₃(s) KCl(s) + O₂(g)

4. How many grams of copper are required to react with 4.00 grams of silver nitrate?

Cu(s) + AgNO₃(aq) Cu(NO₃)₂(aq) + Ag(s)

5. If ammonium sulfate reacts with 22.5 grams of calcium hydroxide, how many grams of ammonia (NH₃) are produced?

(NH₄)₂SO₄(aq) + Ca(OH)₂(aq) NH₃(g) + CaSO₄(aq) + H₂O(l)

6. If sulfuric acid reacts with 36.2 grams of sodium chloride, how many grams of hydrochloric acid are produced?

NaCl(aq) + H₂SO₄(aq) HCl(aq) + Na₂SO₄(aq)

7. How many grams of silver phosphate are produced if 11.9 grams of silver acetate reacts with sodium phosphate?

AgC₂H₃O₂(aq) + Na₃PO₄(aq) Ag₃PO₄(s) + NaC₂H₃O₂(aq)

8. Consider the following reaction:

NaOH(aq) + H₂SO₄(aq) H₂O(l) + Na₂SO₄(aq)

a) How many grams of sodium hydroxide are needed to completely neutralize 25.0 grams of sulfuric acid?

b) If 43.6 grams of sodium sulfate are produced, how many grams of sodium hydroxide are needed?

9. Consider the following reaction:

MnO₂(s) + HCl(aq) MnCl₂(aq) + H₂O(l) + Cl₂(g)

a) Calculate the mass of MnO₂ needed to produce 25.0 grams of water.

b) What mass of MnCl₂ is produced when 0.091 grams of chlorine gas is generated?

c) How many grams of hydrochloric acid is needed to produce 31.66 grams of MnCl₂?