Answer to Question #271233 in General Chemistry for Ems

Question

How long would it take to create 1.2 g of Ni(s) at the cathode with a current of 2.20 A?

Answer 1

m= mass of the substance l in grams = 1.2g

I= total electric current passed through the substance=2.20A

F= 96485 C mol−1

 is the Faraday constant

M= molar mass of the substance=91

z= valency number of ions of the substance (electrons transferred per ion)=3

So, thetotal time required will be $t=\frac {mFz} {M×i}$

​

$t=\frac {1.2×96500×3}{91×2.20}=1735.26sec=0.48hr$