Question

electrolysis can be used to determine atomic masses. a current of 0.550a deposits 0.55 g of a certain metal in 100 minutes. calculate the atomic mass of the metal if eq. wt. = mole wt./3​

Answer 1

Answer: 50 g

Explanation:

$Q=I\times t$

where Q= quantity of electricity in coloumbs

I = current in amperes = 0.550 A

t= time in seconds =100 min= $100\times 60=6000s$

$Q=0.550A\times 6000s=3300C$

$96500 Coloumb$ of electricity deposits equivalent mass of metal

As equivalent weight = $\frac{\text {molecular weight}}{3}$

$96500\times 3=289500Coloumb$ of electricity deposits molecular mass of metal

3300 C of electricity deposits =$\frac{M}{289500}\times 3300=0.011M$ g

But $0.011M=0.55$

$M=50g$