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Calculate the quantity of electricity needed to reduce one centimole of dichromate in acid medium, to chromic state. |
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Answer» Solution :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 |
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