(i) Write the two chemical equations to show the inter conversion of chromates & dichromates in aqueous solution.
(ii) Complete the equation:
`5C_2O_4^(2-) + 2MnO_(4)^(-) + 16H^(+)`.

Explanation

(i) `2CrO_(4)^(2-) + 2H^(+) rarr Cr_(2)O_(7)^(2-) + H_(2)O`
`Cr_(2)O_(7)^(2-) + 2OH^(-) rarr 2CrO_(4)^(2-) + H_(2)O`
`5C_(2)O_(4)^(2-) + 2MnO_(4)^(-) + 16H^(+) rarr 2Mn^(2+) + 8H_(2)O + 10CO_(2)`