For the oxidation of ferric oxalate to `CO_(2), 18F` of electricity is required. How mnay moles of ferric oxalate is oxidized ?

Answer

3

Explanation

Ferric oxalate `[Fe_(2)(C_(2)O_(4))_(3)rarr2Fe^(3+)+3C_(2)O_(4)^(2-)]`
`3C_(2)O_(4)^(2-)rarr 6CO_(2)+6e^(-) [Fe^(3+)` does not change `]`
`:. 6F=1 mol of Fe_(2)(C_(2)O_(4))_(3)`
`18F=3 mol of Fe_(2)(Fe_(2)(C_(2)O_(4))_(3)`