A-Level CAIE Chemistry A2 26.2.3—Mode of action of a homogeneous catalyst Question Bank

• Describe the mode of action of a homogeneous catalyst by being used in one step and reformed in a later step, e.g.:: (a) atmospheric oxides of nitrogen in the oxidation of atmospheric sulfur dioxide; (b) Fe 2+ or Fe3+ in the I–/S2O8; 2– reaction