Question

Electrochemical Equivalent Of Cu.

In The Reaction: ${\mathrm{Cu}}^{2+}+2{\mathrm{e}}^{-}\to \mathrm{Cu}$ Is:

Answer 1

The electrochemical equivalent: of a substance is the mass of the substance deposited to one of the electrodes when a current of 1 ampere is passed for 1 second, i.e. a quantity of electricity of one coulomb is passed

The given reaction is: ${\mathrm{Cu}}^{2+}+2{\mathrm{e}}^{-}\to \mathrm{Cu}$

$\mathrm{Electrochemical}\mathrm{equivalence}\left(\mathrm{Z}\right)=\frac{\mathrm{equivalent}\mathrm{mass}}{\mathrm{F}}$

$\mathrm{Equivalent}\mathrm{weight}=\frac{\mathrm{Molar}\mathrm{mas}}{\mathrm{Valency}}$

$\mathrm{Equivalent}\mathrm{weight}=\frac{\mathrm{M}}{2}$

$\mathrm{Equivalent}\mathrm{weight}=\frac{63.5}{2}$

Therefore, the electrochemical equivalent of Cu in the given chemical reaction is

$\mathrm{Z}=\frac{63.5}{2\times 96500}=0.00032$