(a) H2SeO4(aq) 2 Cl-1(aq) 2 H 1 H2SeO3(aq) Cl2(g) H2O(l) (b) S8(s) 8 O2(g) 8 SO2(g) (c) 3 Br2(aq) 6 OH-1(aq) 5 Br-1(aq) BrO3-1(aq) 3 H2O(l) (d) Ca 2(aq) SO4-2(aq) CaSO4(s) (e) CH3COOH(aq) CN-1(aq) HCN(aq) CH3COO-1(aq) a. A precipitation reaction. b. A Bronsted-Lowry acid-base reaction. c. A reaction in which the same reactant undergoes both oxidation and reduction. d. A combustion reaction.