(a) Electroplating unit plates `3.0g` of silver on a brass plate in 3.0min. Find the current used by the unit. The electrochemical equivalent of silver is `1.12xx10^(-6)kg//C`.
(b) Find the amount of silver liberated at cathode if `0.05A` of current is passed through `AgNO_(3)` electrolyte for `1hr`. Atomic weight of silver is `108g//"mole"`.

Explanation

(a) `m=Zit`
`I = m/(Zt) = (3xx10^(-3))/(1.12xx10^(-6)xx3xx60) =14.9A`
(b) `m = Zt = (Eit)/(F)`
`E = A/V = 108/1 = 108` ltbr. `F = 96500C`
`m=(108xx0.5xx3600)/(96500) = 2.01g`.