Question

$10.07$ gram Silver obtained during the circulations of electric of $5$ ampere upto $30$ minutes in silver nitrate pot (cell). Find out electrochemical equivalent of silver. If chemical equivalent of hydrogen is $0.00001036$ then what will by equivalent weight of Silver.

Answer 1

According to Faraday's first law $W=Zit$.
Given: $W=10.07$ gm,
$i=5$ ampere,
$t=30\times 60$ seconds
$\therefore$ $10.07=Z\times 30\times 60$
$Z=\frac{10.07}{5\times 30\times 60}=0.00111888$
and by $\frac{W_1}{W_2}=\frac{E_1}{E_2}=\frac{Z_1}{Z_2}$
$=\frac{Equivalentmassofsilver}{EquivalentmassofHydrogen}$
$=\frac{ElectrochemicalequivalentofSilver}{Electrochemicalequivalentofhydrogen}$
$\frac{EquivalentweightofSilver}{1}=\frac{0.00111888}{0.00001036}$
Equivalent weight of silver $=108$