Question

A direct current deposits $54g$ of silver (Atomic mass $=108$) during electrolysis. How much aluminium (Atomic mass $=27$) would be deposited from aluminium chloride solution by the same amount of electricity?

• A. $4.5g$
• B. $5.4g$
• C. $54g$
• D. $27g$

Answer 1

The correct option is A $4.5g$

Equivalent mass of silver $=108$

Equivalent mass of aluminium in $\left(AlC{l}_3\right)=\frac{27}{3}=9$

$\frac{W_{Ag}}{W_{Al}}=\frac{E_{Ag}}{E_{Al}}$

$\frac{54}{W_{Al}}=\frac{108}{9}$

$W_{Al}=4.5g$.

Hence, the correct option is $\text{A}$