When hydrogen peroxide decomposes, the rate of reaction can be increased by adding a small amount of solid iron(III) oxide as a catalyst.
The graph below shows four possible lines (A, B, C, and D) plotted against time.
Which line on the graph represents the mass of the iron(III) oxide catalyst during the reaction?
Line A
Line B
Line C
Line D
Practise Edexcel GCSE Chemistry Rates of reaction with exam-style questions for Foundation and Higher tier. 166 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
