Calculate the number of moles of `Sn^(2+)` ion oxidise by `1` mole of `K_(2)Cr_(2)O_(7)` in acidic medium.

Answer

3

Explanation

`[Sn^(2+) rarr Sn^(4+)+2e] xx 3`
`6e + (Cr^(6+))_(2) rarr 2Cr^(3+)`
`:. 1` mole of `K_(2)Cr_(2)O_(7)` will oxidise `3` mole of `Sn^(2+)`