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Rate equations (A-level only)

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Question 4

Two reactants, X X\,X and YYY, react in the presence of a homogeneous catalyst, ZZZ, according to the following equation:

2X+Y→Zproducts 2X + Y \xrightarrow{Z} \text{products} 2X+YZ​products

In a series of rate experiments, the concentration of X X\,X is doubled, the concentration of Y Y\,Y is halved, and the concentration of the catalyst Z Z\,Z is tripled. Under these conditions, the rate of the reaction increases by a factor of 6.

Which of the following is a possible rate equation for this reaction?

A

rate=k[X]2[Y]\text{rate} = k [X]^2 [Y]rate=k[X]2[Y]

B

rate=k[X][Z]2\text{rate} = k [X] [Z]^2rate=k[X][Z]2

C

rate=k[X]2[Y][Z]\text{rate} = k [X]^2 [Y] [Z]rate=k[X]2[Y][Z]

D

rate=k[Y][Z]2\text{rate} = k [Y] [Z]^2rate=k[Y][Z]2

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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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