In the electrolytic refining of Cu assume that impure copper contains only iron, silver and gold as impurities. After passage of 140 A of current for a period of 482.5 sec ., the mass of anode decreas

Question

In the electrolytic refining of Cu assume that impure copper contains only iron, silver and gold as impurities. After passage of 140 A of current for a period of 482.5 sec ., the mass of anode decreased by 22.26 g and the mass of cathode increased by 22.011 g . Choose the correct option(s):

TestHub · Accepted Answer

Reactions at the electrodes are Anode: Fe ⟶ Fe 2 + + 2 e − Cathode: 2 H + + 2 e − ⟶ H 2 ​ ∣ Anode: Cu ⟶ Cu 2 + + 2 e − Cathode: Cu 2 + + 2 e − ⟶ Cu % of Cu in the anode = 22.26 22.011 ​ × 100 = 98.88% Moles of e − released at anode = 96500 140 × 482.5 ​ = 0.7

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Options:(select one or more)

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