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