If 9 g of H 2 O is electrolyzed completely with 50 % current efficiency

Question

If 9 g of H 2 O is electrolyzed completely with 50 % current efficiency (A) 1 F of electricity will be needed (B) 3 F of electricity is needed (C) 5.6 L of O 2 at STP will be formed (D) 11.2 L of O 2 at STP will be formed

Tardigrade Admin · Accepted Answer

<img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/ae2f7aa20dee38233ec6a7d15e70a620-.png" /> for 36 g H 2 O volume of O 2 arrow (22.4/2)=11.2 litre So, 9 g H 2 O volume of O 2 arrow (11.2/36) × 9=2.8 L 50 % current efficiency 2 mole of O 2 arrow 5.6 litre

Q. If $9 g$ of $H_{2} O$ is electrolyzed completely with $50%$ current efficiency

$1 F$ of electricity will be needed

$3 F$ of electricity is needed

$5.6 L$ of $O_{2}$ at STP will be formed

$11.2 L$ of $O_{2}$ at STP will be formed

for $36 g H_{2} O$ volume of $O_{2} \to \frac{22.4}{2} = 11.2$ litre
So, $9 g H_{2} O$ volume of $O_{2} \to \frac{11.2}{36} \times 9 = 2.8 L$
$50%$ current efficiency $2$ mole of $O_{2} \to 5.6$ litre

Q. If 9g of H2​O is electrolyzed completely with 50% current efficiency

1F of electricity will be needed

3F of electricity is needed

5.6L of O2​ at STP will be formed

11.2L of O2​ at STP will be formed