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Question

(a) Copy and complete the following table which refers to two practical applications of electrolysis

AnodeElectrolyteCathode(i) Silver platingSolution of of a spoonpotassiumargentocyanide(ii) Purification Of copper(iii) Extraction Of sodium

(b) Write equations of reactions taking place at anode for Q.2(a).

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Solution

(a)

Anode Electrolyte Cathode
Silver plating of spoon Plate of pure clean silver Solution of potassium argentocyanide Article to be electroplated
Purification of copper Impure copper Solution of copper sulphate and dilute sulphuric acid Thin strip of pure copper
Extraction of sodium Graphite rod Sodium chloride solution Ring of iron


(b)
AgAg++e
Cu(s)2eCu2+(aq)

2ClCl2+2e(Oxidation)​​​​​​​


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