(a) (b) (c) Write the equilibrium reaction and expression for the solubility product for Ca3(PO4)2. (2 marks) With initial concentrations of [H2]0 = 0.86 M. [N2]0 = 0.65 M and [NH3] = 0.45 M, and value of K=9.6 at 375 C, the synthesis of ammonia is given by the reaction; N2(g) + 3H2(g) 2NH3(g) (i) Calculate the reaction quotient Qc, and determine the direction of the reaction. (ii) Explain the changes in the concentration of the reactants and product. For the reaction (5 marks) (4 marks) HO2 + Fe+ Fe + HO (i) Write the oxidation and reduction half reactions (ii) Balance the reaction in acidic medium, showing all steps in balancing. (2 marks) (7 marks)