Question

When electricity is passed through a solution of $AlC{l}_3,13.5g$ of $Al$ is discharged. The amount of charge passed is___________.

• A. $1.5F$
• B. $0.5F$
• C. $1.0F$
• D. $2.0F$

Answer 1

The correct option is A $1.5F$

${Al}^{3+}+3e^{-}\to Al$

moles of Al$=\frac{13.5}{27}=0.5$

moles of electrons required$=0.5\times 3=1.5moles$

charge passed$=1.5F$