O-LevelChemistryRates of Reaction5070/11 · Oct/Nov 2014 · Q11 Mark

Calcium carbonate reacts with hydrochloric acid, producing carbon dioxide gas. CaCO3(s) + 2HCl(aq) → CaCl2(aq) + H2O(l) + CO2(g) The rate of this reaction can be measured using the apparatus shown. Which additional piece of apparatus is also required?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

Aburette

Bclock

Cgas syringe

Dthermometer

✓ Correct answer

B: clock

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

Topic: Rates of Reaction, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2014 Paper 1 Variant 1, question 1.

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