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JAMB Chemistry 2024 Paper

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Question : 111

Total: 138

Calculate the number of moles of Copper that will be deposited, if 2 Faraday of electricity is passed through the copper during the electrolysis of copper(II)tetraoxosulphate(VI)

0.5 mole
1.0 mole
2.0 moles
3.0 moles

Solution:

NB: 1F = 1 mole of electrons of the atom of an element

In the case of copper (Cu), the valency is 2+.

⇒ Cu $^{2+}$ + 2e $^{-}$ → Cu

So, 2F = 1 mole of Cu

then, 2F = x mole

x = $\; \frac{2 \times 1}{2}$

x = 1 mole

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