Balance the following reactions. You may have to supplement the reaction with H+, H2O, or OH depending on the reaction conditions. a) Zn (s) + VO2+ (aq) ? Zn2+ (aq) + V3+ (aq) (acidic conditions) b) Zn (s) + VO3- (aq) ? V2+ (aq) + Zn2+ (aq) (acidic conditions) c) Zn (s) + ClO- (aq) ? Zn(OH)2 (s) + Cl- (aq) (basic conditions) d) ClO- (aq) + [Cr(OH)4]- (aq) ? Cl- (aq) + CrO42- (aq) (basic conditions)