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(1) Calculate the charge required in coulombs to deposit of copper at cathode from solution. (2)…
(a)
(1) Calculate the charge required in coulombs to deposit $6\cdot35\text{ g}$ of copper at cathode from $\text{CuSO}_4$ solution.
(2) How much time is required for deposition of copper if an electric current of $3\cdot5\text{ ampere}$ is passed through the electrolyte mentioned above?
(Atomic Mass of $\text{Cu} = 63\cdot5\text{ g mol}^{-1}$)
(b)
Can an aluminium vessel be used to store dil. $\text{HCl}$? Give a reason for your answer by referring to the values given below.
$E^\circ_{\text{Al}^{3+}/\text{Al}} = -1\cdot66\text{ V}$, $E^\circ_{\text{H}^+/\text{H}_2} = 0\cdot00\text{ V}$
Answer
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From ISC 2026 Improvement Chemistry Paper 1, question 18(i).