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Valency and Oxidation State

Copper sulpha...

Question

Copper sulphate solution is electrolysed using copper electrodes.

(ii) Write the equation representing the reaction that occurs.

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Solution

Reaction at the anode:
$C u \to C u^{2 +} + 2 e^{-}$ Reaction at the cathode: $C u^{2 +} + 2 e^{-} \to C u$

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(a) State one appropriate observation for: Electricity is passed through molten lead bromide.

(b) State which of these will act as a non-electrolyte

(i) Liquid carbon tetrachloride

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(iii) Sodium hydroxide aqueous solution

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(i) Which electrode to your left or right is known as the oxidising electrode and why ?

(ii) Write the equation representing the reaction that occurs.

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(a) State observation at the anode when aqueous copper sulphate solution is electrolysed using copper electrodes.

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