Complete the following chemical equations for reactions in aqueous solution.
(i) `Cr_(2)O_(7)^(2-)+H^(+)+Fe^(2+) to `
(ii) `MnO_(4)^(-)+I^(-)+H^(+) to `
(iii) `MnO_(4)^(-)+C_(2)O_(4)^(2-)+H^(+) to `

Explanation

(i) `Cr_(2)O_(7)^(2-)+14H^(+)+6Fe^(2+) to 2Cr^(3+)+6Fe^(3+)+7H_(2)O`
(ii) `2MnO_(4)^(-)+16H^(+)+10I^(-) to 2Mn^(2+)+5I_(2)+8H_(2)O`.
(iii) `2MnO_(4)^(-)+5C_(2)O_(4)^(2-)+16H^(+) to 2Mn^(2+)+10CO_(2)+8H_(2)O`.