O-LevelChemistryStoichiometry5070/12 · May/June 2014 · Q111 Mark

Sulfuric acid and potassium hydroxide can react together to form potassium hydrogensulfate, KHSO4, and water only. Which amounts of the reactants are required?

Aequal masses of sulfuric acid and potassium hydroxide

Bequal numbers of moles of sulfuric acid and potassium hydroxide

C1 mol of sulfuric acid to 2 mol of potassium hydroxide

D2 mol of sulfuric acid to 1 mol of potassium hydroxide

✓ Correct answer

B: equal numbers of moles of sulfuric acid and potassium hydroxide

Oracle Prep sorts past-paper questions by topic, so you can drill Stoichiometry and see which topics are most likely to come up next.

Topic: Stoichiometry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2014 Paper 1 Variant 2, question 11.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content