Manipal MET2019ChemistryElectrochemistry

The standard emf of a cell Zn / Zn ²⁺ | Fe ²⁺ / Fe , if electrode potentials for ( Zn / Zn ²⁺ ) and ( Fe ²⁺ / Fe ) and 0.763 V and -0.44 V respectively is

Options

A+ 0.323 V
B-1.203 ~V
C+ 1.203 V
D-0.323 ~V

Correct answer

A. + 0.323 V

Step-by-step solution

Cell Zn | Zn ²⁺ | Fe ²⁺ | Fe Electrode potential for Zn / Zn ²⁺=0.763 ~V Electrode potential for aligned & Fe ²⁺ / Fe =-0.44 ~V EMF of cell & =E_ oxidation ( Fe ) ^ +E_ reduction ( Zn ) ^ & =-0.44+0.763 & =0.323 ~V aligned

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