A current of `2.68 A` is passed for `1.0` hour through an aqueous solution of `CuSO_(4)` using copper electrodes.
Which of the following statements is `//` are correct ?

Options

A. Increase in the mass of cathode `=3.174g`
B. Decrease in the mass of anode `=3.174g`
C. No change in the mass of electrodes
D. The ration between the change in the mass of cathode to anode is `1:2`

Answer

a,b

Explanation

Number of Faradays `-= (It)/(96500)=(2.68xx1xx3600)/(96500)=0.1`
At cathode `: Cu^(2+)(aq)+2e^(-) rarr Cu(s)`
`implies 2F-=1 mol Cu`
`implies0.1 -=0.05 mol e Cu -= Cu-= 0.05xx63.5g Cu`
`=3.175g Cu` deposited
At anode `: Cu(s) rarr Cu^(2+)(aq) +2e^(-)`
`implies 2F-=1 mol e Cu`
`implies 0.1 F-=0.05 mol e Cu =0.065xx63.5g Cu`
`=3.175Cu` used