A manufacturer uses catalyst C in a reaction that removes a harmful substance from waste gas. The energy change for the reaction is represented by a reaction profile.
How does adding catalyst C change the reaction profile?
It increases the energy difference between the reactants and products.
It lowers the highest point on the pathway.
It lowers the energy level of the reactants.
It raises the energy level of the products.
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.