[题目]配平下列电极反应:-|||-(1) _(2)(O)_(7)^2-arrow C(r)^3+ (酸性介质);-|||-(2) (Mn{O)_(4)}^-arrow (Mn)^2+ (酸性介质);-|||-(3) (Mn{O)_(4)}^-arrow Mn(O)_(2) (中性介质);-|||-(4) _(2)arrow (I)_(3)- (碱性介质);-|||-(5)H2C2O4→CO2(酸性介质);-|||-(6) _(2)(O)_(2)arrow (O)_(2) () (酸性介质);-|||-(7) _(2)(O)_(2)arrow (O)_(2) () (碱性介质);-|||-(8)H2O2→H2 O(酸性介质); ()-|||-(9) _(2)(O)_(2)arrow OHarrow (碱性介质);-|||-(10) ^++(Cl)^-arrow AgCl