Chapter 16, Problem 4E

Balance the equations below assuming they occur in an acidic solution.

(a) ${\text{H}}_{\text{2}}{\text{O}}_{\text{2}}{\text{+ Sn}}^{\text{2}}\text{+ }\to {\text{H}}_{\text{2}}{\text{O + Sn}}^{\text{4+}}$

(b) ${\text{PbO}}_{\text{2}}\text{+ Hg}\to {\text{Hg}}_{\text{2}}{}^{\text{2+}}{\text{+ Pb}}^{\text{2+}}$

(c) ${\text{A1 + Cr}}_{\text{2}}{\text{O}}_{\text{7}}{}^{\text{2-}}\to {\text{A1}}^{\text{3+}}{\text{+ Cr}}^{\text{3+}}$