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• 18.55 A steady current was passed through molten CoSO4 until 2.35 g of metallic cobalt was pro- duced. Calculate the number
• 18.59 The passage of a current of 0.750 A for 25.0 min deposited 0.369 g of copper from a CuSO4 solution. From this informa
18.87 In a certain electrolysis experiment involving Al+ ions, 60.2 g of Al is recovered when a current of 0.352 A is used. H
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Answer #1

18.55) using Faraday's law

Mass =ZQ

Mass =MQ/n

2.35 = 59×Q/2F

Q= 7686.1C

2) mass = Mit/nF

0.369 = M×0.750×25.0×60/2×96485

M = 63.2 g/mol

3) mass = Mit/nF

60.2 = 27×0.352×t/3×96485

t = 30557.6 min.

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