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Redox and electrochemistry — Question 89

Original QCE Vault practice · 7 marks

Q89 · Practice questionComplex unfamiliar7 marks

QUESTION 89 (7 marks)

A copper-plating cell runs at 1.50 A for 32.0 min. It deposits 0.740 g Cu. All current not used for copper deposition produces hydrogen by 2H++2e−→H2. Use F=96485 Cmol−1, M(Cu)=63.55 gmol−1 and gas molar volume 24.8 Lmol−1.

a) Calculate the theoretical copper mass at 100% current efficiency. [3 marks]

b) Calculate the copper current efficiency. [1 marks]

c) Calculate the hydrogen volume produced. [3 marks]

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