Electrochemistry Question 12
Question 12 - 2024 (31 Jan Shift 1)
One Faraday of electricity liberates $\mathrm{x} \times 10^{-1}$ gram atom of copper from copper sulphate, $x$ ________ is
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Answer (5)
Solution
$\mathrm{Cu}^{2+}+2 \mathrm{e}^{-} \rightarrow \mathrm{Cu}$
2 Faraday $\rightarrow 1 \mathrm{mol ~Cu}$
1 Faraday $\rightarrow 0.5 \mathrm{mol ~Cu}$ deposit
$0.5 \mathrm{~mol}=0.5 \mathrm{~g}$ atom $=5 \times 10^{-1}$
$\mathrm{x}=5$
