CHEMISTRY REVIEW PRACTICE PROBLEMS - UNIT 6B - ACIDS & BASES
Neutralization & Titration
1. A 32.0 mL sample of nitric acid is completely neutralized by 25.0 mL of 0.180 mol L⁻¹ potassium
hydroxide. Calculate the concentration of the nitric acid.
HNO₃(aq) + KOH(aq) → H₂O(l) + KNO₃(aq)
2. What volume of 0.250 mol L⁻¹ sulfuric acid is required to completely react with 40.0 mL of 0.300
mol L⁻¹ sodium hydroxide? H₂SO₄(aq) + 2NaOH(aq) → Na₂SO₄(aq) + 2H₂O(l)
3. A 15.0 mL solution of barium hydroxide is neutralized by 36.0 mL of 0.120 mol L⁻¹ hydrochloric
acid. Determine the concentration of the barium hydroxide. Ba(OH)₂(aq) + 2HCl(aq) → BaCl₂(aq)
+ 2H₂O(l)
4. How many millilitres of 0.0950 mol L⁻¹ potassium hydroxide are needed to neutralize 55.0 mL of
0.0300 mol L⁻¹ phosphoric acid? H₃PO₄(aq) + 3KOH(aq) → K₃PO₄(aq) + 3H₂O(l)
5. A 50.0 mL sample of magnesium hydroxide solution requires 28.0 mL of 0.220 mol L⁻¹
hydrobromic acid for complete neutralization. Find the concentration of the magnesium
hydroxide. Mg(OH)₂(aq) + 2HBr(aq) → MgBr₂(aq) + 2H₂O(l)
6. What volume of 0.175 mol L⁻¹ nitric acid is needed to react completely with 62.0 mL of 0.0100
mol L⁻¹ calcium hydroxide? Ca(OH)₂(aq) + 2HNO₃(aq) → Ca(NO₃)₂(aq) + 2H₂O(l)
7. A student titrates 20.0 mL of acetic acid and finds that it is neutralized by 14.5 mL of 0.300 mol
L⁻¹ sodium hydroxide. Calculate the molarity of the acetic acid.
CH₃COOH(aq) + NaOH(aq) → CH₃COONa(aq) + H₂O(l)
Answer Key
1. 0.141 mol L⁻¹ 5. 0.0616 mol L⁻¹
2. 24.0 mL 6. 7.1 mL
3. 0.144 mol L⁻¹ 7. 0.218 mol L⁻¹
4. 52.5 mL
Neutralization & Titration
1. A 32.0 mL sample of nitric acid is completely neutralized by 25.0 mL of 0.180 mol L⁻¹ potassium
hydroxide. Calculate the concentration of the nitric acid.
HNO₃(aq) + KOH(aq) → H₂O(l) + KNO₃(aq)
2. What volume of 0.250 mol L⁻¹ sulfuric acid is required to completely react with 40.0 mL of 0.300
mol L⁻¹ sodium hydroxide? H₂SO₄(aq) + 2NaOH(aq) → Na₂SO₄(aq) + 2H₂O(l)
3. A 15.0 mL solution of barium hydroxide is neutralized by 36.0 mL of 0.120 mol L⁻¹ hydrochloric
acid. Determine the concentration of the barium hydroxide. Ba(OH)₂(aq) + 2HCl(aq) → BaCl₂(aq)
+ 2H₂O(l)
4. How many millilitres of 0.0950 mol L⁻¹ potassium hydroxide are needed to neutralize 55.0 mL of
0.0300 mol L⁻¹ phosphoric acid? H₃PO₄(aq) + 3KOH(aq) → K₃PO₄(aq) + 3H₂O(l)
5. A 50.0 mL sample of magnesium hydroxide solution requires 28.0 mL of 0.220 mol L⁻¹
hydrobromic acid for complete neutralization. Find the concentration of the magnesium
hydroxide. Mg(OH)₂(aq) + 2HBr(aq) → MgBr₂(aq) + 2H₂O(l)
6. What volume of 0.175 mol L⁻¹ nitric acid is needed to react completely with 62.0 mL of 0.0100
mol L⁻¹ calcium hydroxide? Ca(OH)₂(aq) + 2HNO₃(aq) → Ca(NO₃)₂(aq) + 2H₂O(l)
7. A student titrates 20.0 mL of acetic acid and finds that it is neutralized by 14.5 mL of 0.300 mol
L⁻¹ sodium hydroxide. Calculate the molarity of the acetic acid.
CH₃COOH(aq) + NaOH(aq) → CH₃COONa(aq) + H₂O(l)
Answer Key
1. 0.141 mol L⁻¹ 5. 0.0616 mol L⁻¹
2. 24.0 mL 6. 7.1 mL
3. 0.144 mol L⁻¹ 7. 0.218 mol L⁻¹
4. 52.5 mL
