Nickel and aluminum electrodes are used to build a galvanic cell. the standard reduction potential for the nickel(ii) ion is −0.26 v and that of the aluminum(iii) ion is −1.66v. what is the theoretical cell potential assuming standard conditions?

Respuesta :

The standard cell potential is
E°cell =E° redn(cathode) - E° redn (anode)
Nickel electrodes will become cathode this is because it has a higher reduction potential that is why Al becomes anode.
E°cell=-0.26-(-1.66)=1.4V

The theoretical cell potential for the voltaic cell is 1.44 V.

We know that the cell that comprises nickel and aluminum must be a voltaic cell since aluminum is far higher in the series than nickel. Nickel is the cathode while aluminum is the anode.

Ecell = Ecathode - Eanode

Ecell =  −0.26 v  - ( −1.66v)

Ecell = 1.44 V

The theoretical cell potential for the voltaic cell is 1.44 V.

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