Question

When a current of 1.5 amperes strength is passed
through a solution of a salt of a metal (at mass =
112) for 15 minutes 0.783 g of the metal is
deposited. Find out the valency of the metal.
(e)
​

Answer 1

valency is 2

1.5 x15 x60 colomb deposited amount is 0.783 gm.

96500 C how much deposited?

96500x0.783/1.5x15x60 = 56gm

the amount deposited by passing 1F electric charge is it's equivalent weight.

equivalent weight = Molarmass / valency

56=112/valency

valency =2