Question

when 1 C of charge is allowed to flow through in electrolyte the mass of substance deposited is equal to
a. E.C.E of that substance
b. equivalent weight of that substance
c. atomic weight of that substance ​

Answer 1

When 1 C charge is the amount of substance deposited is 1 E.C.E.

as the electrochemical equivalent(E.C.E) of a substance may be defined as 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. threfore the amount of mass of substance deposited is E.C.E. of that substance and the answer of the question is option

A. E.C.E of that substance

Answer 2

When 1 C of charge is allowed to flow through in electrolyte the mass of substance deposited is equal to E.C.E of that substance

Explanation:

1 electron carry charge=$1.6\times 10^{-19}C$

1 mole of electrons contain= electrons

Thus  1 mole of electrons carry charge=

$A^{n+}+ne^-\rightarrow A$

If n electrons are involved in the reaction, the passage of $(n\times 96500C)$ of electricity will liberate molecular mass of the substance.

1 Faraday of electricity will liberate=$\frac{\text {Molecular mass}}{n\times 96500}\times 1=\text {Equivalent chemical equivalent}$

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