First slide

Faraday's Laws

Question

965 amp current is passed through molten metal chloride for one minute and 40 seconds during electrolysis. The mass of metal deposited is 9 gm at the cathode. The valency of metal atom (at.wt = 27) is

Easy

Solution

$m = \frac{{Ait}}{{n \times 96500}} \Rightarrow n\left( {valency} \right) = \frac{{27 \times 965 \times 100}}{{9 \times 96500}} = 3$

1 min 40 =100 sec

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