O-LevelChemistryStoichiometry5070/11 · May/June 2019 · Q111 Mark

In a volumetric experiment, 25.0 cm³ of 0.100 mol/dm³ sodium hydroxide reacts exactly with 20.0 cm³ of sulfuric acid. 2NaOH + H₂SO₄ → Na₂SO₄ + 2H₂O What is the concentration of the sulfuric acid?

A0.0625 mol/dm³

B0.0800 mol/dm³

C0.125 mol/dm³

D0.250 mol/dm³

✓ Correct answer

A: 0.0625 mol/dm³

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 2019 Paper 1 Variant 1, 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

The equation for the burning of hydrogen in oxygen is shown. 2H2(g) + O2(g) → 2H2O(g) What does this equation indicate?

For which molecules are the empirical and molecular formulae the same? 1. methanoic acid, HCO2H 2. ethanoic acid, CH3…

A 10 cm³ sample of a gaseous hydrocarbon is completely burnt in oxygen. The total volume of the products is 70 cm³. A…

An alloy of copper and zinc is added to an excess of dilute hydrochloric acid. Which observations are correct?

From your knowledge of the manufacture of both aluminium and iron, what is the order of chemical reactivity of alumin…

Which compound will not produce ammonia when heated with ammonium sulfate?