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The mass of zinc produced by the electrolysis of zinc sulphate solution with a steady current of 0.015 A for 15 minutes is 10-4 g. (Atomic mass of zinc = 65.4 amu)
46
Zn2+ + 2e- Zn ⇒ Faraday's first law: W = MnF I t
Q = It = 0.015 15 60 = 13.5 C
W = 65.42 96500 13.5
= 4.575 10-3 g = 45.75 10-4 g 46 10-4 g
Answer: 46
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