A cube of zinc of side 2.0 cm was added to excess dilute hydrochloric acid. The experiment was repeated using the same mass of zinc cut into eight cubes of side 1.0 cm.
Calculate the total surface area of the single cube of side 2.0 cm.
Calculate the total surface area of the eight cubes of side 1.0 cm.
Explain, using your answers to parts a and b, why the eight smaller cubes react faster than the single cube.
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.