A-LevelChemistryReaction kinetics9701/12 · May/June 2021 · Q111 Mark
Two chemicals, X and Y, react together in solution to give product Z. The rate of formation of product Z at the start of the reaction was measured in five experiments, 1–5, using various concentrations of X and Y. The results are shown. experiment number starting concentration of X / mol dm⁻³ starting concentration of Y / mol dm⁻³ rate of formation of Z at the start / mol dm⁻³ s⁻¹ 1 0.10 0.10 0.0001 2 0.10 0.20 0.0004 3 0.10 0.40 0.0016 4 0.20 0.10 0.0001 5 0.40 0.10 0.0001 Which statement is correct?
AThe rate of the reaction is directly proportional to the concentration of reagent X.
BThe rate of the reaction is directly proportional to the concentration of reagent Y.
CThe rate of the reaction is not affected by the concentration of reagent X.
DThe rate of the reaction is not affected by the concentration of reagent Y.
✓ Correct answer
C: The rate of the reaction is not affected by the concentration of reagent X.
Practise more questions on this topic
Oracle Prep sorts past-paper questions by topic, so you can drill Reaction kinetics and see which topics are most likely to come up next.
Sign up free →