Ijmb Model Questions Vol1 2025 Chemistry Question 10

Practice essay / theory question 10 from the 2025 Ijmb Model Questions Vol1 Chemistry examination. This question covers Electrochemistry, Galvanic Cells, Nernst Equation, Electrolysis .

Ijmb Model Questions Vol1 2025 Chemistry Essay / Theory
Topics: Electrochemistry Galvanic Cells Nernst Equation Electrolysis
Question 10 IJMB_MODEL_QUESTIONS_VOL1 • 2025 • CHEMISTRY • essay

A galvanic cell is set up with a copper electrode in CuSO₄ solution and a zinc electrode in ZnSO₄ solution. The cell notation is: Cu(s) | Cu²⁺ (0.010 M) || Zn²⁺ (0.10 M) | Zn(s). Standard reduction potentials are: Cu²⁺ + 2e⁻ → Cu E° = +0.34 V; Zn²⁺ + 2e⁻ → Zn E° = –0.76 V.

Question Parts

( a )
Write the overall cell reaction and identify which electrode functions as the anode and which as the cathode under standard conditions.
( b )
Using the concentrations given, calculate the cell potential at 25 °C with the Nernst equation.
( c )
If a current of 0.250 A is passed through the cell for 2.00 h, determine the mass of zinc that would be deposited on the zinc electrode (assume the cell operates as an electrolytic cell for zinc plating). Use F = 96 485 C mol⁻¹ and the molar mass of Zn = 65.38 g mol⁻¹.
( d )
Calculate the electrical energy (in kJ) consumed during the electrolysis in part (c), taking the cell potential obtained in part (b) as the operating voltage (assume it remains constant).

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About This Question

This is Ijmb Model Questions Vol1 2025 Chemistry Question 10. It is one of the essay questions from the 2025 Ijmb Model Questions Vol1 Chemistry examination.

The question covers Electrochemistry, Galvanic Cells, Nernst Equation, Electrolysis .

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