Question

The chemical equivalent of silver is 108. If the current in a silver voltameter is 2 Amp., the time required to deposit 27 grams of silver will be

• A. 8.57 hrs
• B. 6.70 hrs
• C. 3.35 hrs
• D. 12.50 hrs

Answer 1

Answer: (C)

3.35 hrs

Answer 2

m = Zi t ⇒ $t = \frac{m}{Zi} = \frac{m \times F}{E \times i}$ $\left( \because Z = \frac{E}{F} \right)$

$t = \frac{27 \times 96500}{108 \times 2} = 12062.5\sec = \frac{12062.5}{3600}hr = 3.35hr$