Chemistry · May / June 2024 · Paper 11 · Question 17
5070Rate of reaction
A 2 g sample of calcium carbonate reacts with dilute hydrochloric acid as shown. CaCO3(s) + 2HCl(aq) → CaCl2(aq) + CO2(g) + H2O(l) Which change in conditions makes the reaction proceed more slowly?
- Aincreasing the acid concentration
- Bincreasing the size of the solid particles
- Cincreasing the surface area of the solid particles
- Dincreasing the temperature
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Correct answer: B. increasing the size of the solid particles
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