2. Answer BOTH parts a) and b). a) How you would perform a co-precipitation reaction for the synthesis of a mixed-metal oxide catalyst precursor? Include in your answer a sketch of the equipment used, suitable reactants, and two common variations in the methodology. [4] b) The catalyst precursor vanadium phosphate hemi-hydrate (VOHPO40.5H2O) can be formed via three main routes from V2O5. Describe these three routes including balanced chemical equations for each. [6]