Question

Through an aqueous solution of an unknown salt of metal M (M = 200 g/mol) a current of 1.93 A is passed for 50 min. If 4 g of metal is produced at cathode. The charge on metal ion in solution is ______.

Options

• 1

• 2

• 3

• 4

Answer 1

Through an aqueous solution of an unknown salt of metal M (M = 200 g/mol) a current of 1.93 A is passed for 50 min. If 4 g of metal is produced at cathode. The charge on metal ion in solution is 3.

Explanation:

\[\ce{M + x -> M(s)}\]

e_m = `"Q"/96500`

n_M × X_f of M = `("i" xx "t")/96500`

`4.0/200 xx "X"_("f"_"M") = (1.93 xx 50 xx 60)/96500`

`"X"_("f"_"M")` = 3

Charge on metal ion = 3