Balance the net equtation fro th reaction of potassium dichromate (VI), `K_(2) Cr_(2) O_(7)`, with sodium sulphite, `Na_(2)SO_(3)`, in an acid solution to give chromium (III) ion and and sulphate ion.
Strategy : Follow the seven -step proceduce , one step at a time.

Explanation

Skeleton equation is `Cr_(2)O_(7)^(-) +SO_(3)^(2-) to Cr^(3+) +SO_(4)^(2-)`

`Cr_(2)O_(7)^(2-)+ 3SO_(3)^(2-) to 2Cr^(3+)+3SO_(4)^(2-)`
`Cr_(2)O_(7)^(2-)+3SO_(3)^(2-) to 2Cr^(3+)+3SO_(4)^(2-)+4H_(2)O`
`Cr_(2)O_(7)^(2-)+3SO_(3)^(2-) to 8H^(+) to 3SO_(4)^(2-)+4H_(2)O`