copper is electroplated from CuSO4 solution A constant curen

copper is electroplated from CuSO4 solution. A constant curent of 4.39 A is applied by an external power supply. How long will it take to deposit 1.00x10^2g of Cu? The atomic mass of copper is 63.546

Solution

i = 4.39A

let time = tsec

i=q/t

q = 4.39*t coulomb

Cu2+ + 2e- ---> Cu

also q= nF

n = 4.39t/96500 = 4.549*10^-5 * t mol e-

2moles e- are taken by 1 mole of Cu

so moles of Cu formed = 4.459*10^-5 *t /2 = 2.274*10^-5 *t moles od Cu

mass = 2.274*10^-5 *t * 63.546

but mass given = 100g

so t = 69202.426 sec = 19.22 hours