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pH of Acids and Bases Practice Questions

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Updated on Sep 25, 2011

Review the following concepts if needed - pH of Acids and Bases Study Guide

Practice Questions

For problems 1-4, Show the reaction when the following substances react.

  1. H2SO4 + NaOH →
  2. Al + HCl →
  3. Lithium oxide + nitric acid →
  4. Calcium carbonate + HCl →
5. Calculate the pH of a 0.005 M HNO3 solution.
6. Calculate the pH of a 0.010 M KOH solution.
7. Calculate the pH of concentrated HCl (12 M).
8. What is the pH of a 0.25 M solution of hydrofluoric acid?
9. What is the pH of a 0.010 M solution of formic acid?
10. What is the pH of a 1.25 M solution of ammonia (Kb = 1.8 * 10–5)?
11. What is the pH of a 4.3 M solution of aniline (Kb = 4.28 * 10–10)?
12. What is the pH of a phosphate buffer solution with 1.35 M H2PO4– and 0.58 M HPO4–2 (Ka of H2PO4– is 6.2 * 10–8)?
13. What is the pH of a carbonate buffer solution with 1.36 M H2CO3 and 0.61 M HCO3–?

 Answers

1. H2SO4 + 2NaOH → Na2SO4 + 2H2O
2. 2Al + 6HCl → 2AlCl3 + 3H2
3. Li2O + 2HNO3 → 2LiNO3 + H2O
4. CaCO3 + 2HCl → CaCl2 + CO2 + H2O
5. 2.3
6. 12 (pOH = 2)
7. –1.08
8. 1.90
9. 2.87
10. 2.33
11. 4.36
12. 6.84
13. 6.00
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