Question

9.65 amp current is passing through molten Alcl3 for one minute forty seconds during electrolysis. The mass of Al deposited is 0.09 g at the cathode. What is the valency of Al

Answer 1

Given:

Current passing through molten AlCl₃ (I) = 9.65 A

Mass of Aluminium deposited at the cathode = 0.09 g

Time = 1 min 40 sec = 100 sec

To find:

The valency of aluminium

Calculation:

we know the relation

    $Mass\ deposited=\frac{Atomic\ weight\times i\times t}{n\ factor}$

By substituting the given values in the above relation

    $0.09=\frac{27\times 9.65\times 100}{n\times96500}$

    $n=\frac{27\times 9.65\times100}{0.09\times96500}$

    $n=3$

Final answer:

The valency of the aluminium is 3    

     

Answer 2

Answer:

answer is 3.............