An electric current is passed through silver nitrated solution using silver electrodes . ` 10. 79 g` of silver qas found to be deposited on the cathode fi the same amount of electricity is passed through copper sulphate solutin using copper electrodes. the weihgt of copper deposited on teh cathode is .

Options

A. ` 6.4 G`
B. ` 2.3 g`
C. ` 12 .8 g`
D. ` 3.2 g`

Answer

D

Explanation

Number of equivalents of silve formed = Number of equivalents of copper formed .
In `AgNO_3, AG` is in + 1 oxidation state.
In `CuSO_4` Cu is in ` + 2` oxidation state.
Equivalent weight `Ag = ( 108)/1 = 108`
Equivalent weight `Cu = (63.6)/@ = 31 . 8`.
`M_1/M_2 = E_1 /E_2 , ( 10. 97)/(MCu) = (108)/(31.8)`
`M_(Cu) = (10. 79 xx 31. 8)/( 108) = 3 2 g`.