Calculate the quantity of electricity needed to reduce one centimole of dichromate in acid medium, to chromic state.

Explanation

The stoichiometric equation is ,
`Cr_(2)O_(7)^(2-)+14H^(+)+6e^(-) rarr 2Cr^(3+)+7H_(2)O`
One mole of dichromate `=6` moles of electrons `=` 579000 coul. Quantity of electricity required to reduce one centimole of `Cr_(2)O_(7)^(2-)` to `Cr^(3+)=5790` coulomb