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Question

If the aqueous solutions of the following salts are electrolyzed for 1 hour with 10 ampere current, which solution will deposit the maximum mass of the metal at the cathode? The atomic weights are, Fe = 56.Zn = 65, Ag = 108. Hf = 178 and W = 184
(a) ZnSO4 (b) FeCl3 (c) AgNO3 (d) WCl6

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Solution

Dear Student,

The computation are expressed below,

Given:t=1 hr = 3600 sI = 10 A10 A = 10 Cs10Cs×3600 s = 36000 Cmoles of electron for 36000 C is,36000 C96485.309 Cmol of e-=0.373 mol of e-The maximum deposited metal is AgNO3 (108×0.373=2.68 gm)
Regards

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