1.

The cell emf in a cell with cell reaction Cr_2O_7^(2-) + 14H^(+) + 6Fe^(+2) to 2Cr^(+3) + 6Fe^(+3) + 7H_2O could be increased above the standard emf by

Answer»

Increasing `[Cr^(+3)]`
Decreasing `[FE^(+3)]`
Decreasing `[Cr_2O_7^(2-)]`
Decreasing the pH

SOLUTION :`E = E^(0) + (0.0591)/(n) LOG""([Cr_2O_7^(-2)][H]^(14) + [Fe^(+2)]^(6))/([Cr^(+3)][Fe^(+3)]^6)`


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