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Rate equations (A-level only)

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Question 1

Solutions of two compounds, P\text{P}P and Q\text{Q}Q, react together in the presence of a soluble catalyst, S\text{S}S, as shown in the equation:

P+2Q→R \text{P} + 2\text{Q} \rightarrow \text{R} P+2Q→R

When the concentrations of P\text{P}P, Q\text{Q}Q, and S\text{S}S are all doubled, the rate of reaction increases by a factor of eight.

Which is a possible rate equation for this reaction?

A

rate=k[P][Q]\text{rate} = k [\text{P}] [\text{Q}]rate=k[P][Q]

B

rate=k[Q]2[S]\text{rate} = k [\text{Q}]^2 [\text{S}]rate=k[Q]2[S]

C

rate=k[P]2[Q]2\text{rate} = k [\text{P}]^2 [\text{Q}]^2rate=k[P]2[Q]2

D

rate=k[P][S]\text{rate} = k [\text{P}] [\text{S}]rate=k[P][S]

Markscheme

Rate equations (A-level only) Questions

  1. A Level
  2. /Chemistry
  3. /Rate equations (A-level only)

32 exam-style questions on AQA A Level Chemistry Rate equations (A-level only), covering Rate equations (A-level only) and Determination of rate equation (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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