Question 8
HA student investigated the decomposition of hydrogen peroxide solution using a catalyst. The student measured the total volume of oxygen given off.
The figure shows the student's results.
Figure: The total volume of oxygen collected against time for the decomposition of hydrogen peroxide solution
a.[1]
Draw a tangent to the curve at 40 s on the figure.
b.[3]
Use your tangent to determine the rate of reaction at 40 s.
Give your answer in cm3/s\text{cm}^3\text{/s}cm3/s.
c.[2]
Explain why the rate of reaction at 100 s is lower than the rate of reaction at 40 s.
6.1 Rate of reaction Questions
41 exam-style questions on AQA GCSE Chemistry 6.1 Rate of reaction, covering 6.1.1a Calculating rates of reactions, 6.1.1b Gradient of a tangent as rate, 6.1.2 Factors which affect the rates of chemical reactions, 6.1.3 Collision theory and activation energy, and 6.1.4 Catalysts. Each one has a worked solution and a mark scheme showing where the marks go.