An oxygen absorber used in food packaging contains iron, which reacts with oxygen in the sealed package. Oxygen needs to be removed quickly.
The absorber could contain the same mass of iron as either a fine powder or a solid disc.
Explain why the manufacturer should use fine iron powder rather than a solid iron disc.
127 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.