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WAEC Chemistry 2010 Paper

Question : 29

Total: 38

The quantity of electricity required to discharge 1 mole of univalent ion is

Solution:

Concept:

One mole of a univalent ion needs exactly 1 Faraday of electricity for complete discharge.

Explanation:

For a univalent ion, the charge number is

n = 1

The charge required is given by

Q = nF

Here,

F = 96{,}500\ \mathrm{C\ mol^{-1}}

So,

Q = 1 \times 96{,}500 = 96{,}500\ \mathrm{C}

Therefore, the quantity of electricity required is

96{,}500\ \mathrm{C}

Answer:

96{,}500\ \mathrm{C}

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