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 mass of cathode = 3.175 g
B. Decrease in mass of anode = 3.175 g
C. No change in mass of electrodes
D. The ratio between the change in mass of cathode to anode is 1 : 2

Answer

A, B

Explanation

Number of Faradays `equiv(it)/( 96500) + (2.68xx1xx3xx3600)/( 96500) = 0.1`
At Cathode : `Cu(2+) (aq) + 2e^(-)rightarrowCu(s)`
`Rightarrow 2F equiv 1 ("mole")CuRightarrow 0.1F equiv 0.05("mole") Cu= 0.05xx63 .5 gm Cu= 3.175 gCU` deposited
At anode : `(Cu (s)rightarrow Cu^(2+) (aq) + 2e^(-)Rightarrow 2F equiv1 ("mole") Cu Rightarrow 0.1F equiv 0.05 ("mole") Cu = 3.175 gm Cu` used .