Skip to content

Course home

Sign up

Rate equations (A-level only)

EasyMedium
12345678
Question 5

Two compounds, X X\,X and YYY, react in aqueous solution in the presence of a soluble catalyst, ZZZ, as shown in the equation:

2X+Y→W 2X + Y \rightarrow W 2X+Y→W

When the concentration of X X\,X is doubled, and the concentrations of Y Y\,Y and Z Z\,Z are both tripled, the rate of reaction increases by a factor of 18.

Which 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]\text{rate} = k [X] [Z]rate=k[X][Z]

C

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

D

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

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.

Question bank