The Total solution for NCERT class 6-12
A solution of Ni(NO3)2┬аiselectrolysed between platinum electrodes using a current of 5 amperes for 20minutes. What mass of Ni is deposited at the cathode?
Given,
Current = 5A
Time = 20 ├Ч 60 = 1200 s
Charge = current ├Ч time
= 5 ├Ч 1200
= 6000 C
According to the reaction,
Nickel deposited by 2 ├Ч 96487 C =58.71 g
Therefore,nickel deposited by 6000 C┬а
= 1.825 g
Hence, 1.825 g of nickel will bedeposited at the cathode.