Ijmb Model Questions Vol1 2018 Chemistry Question 10

Practice essay / theory question 10 from the 2018 Ijmb Model Questions Vol1 Chemistry examination. This question covers Electrochemistry .

Ijmb Model Questions Vol1 2018 Chemistry Essay / Theory
Topic: Electrochemistry
Question 10 IJMB_MODEL_QUESTIONS_VOL1 • 2018 • CHEMISTRY • essay

A galvanic cell is constructed with a copper electrode immersed in a 0.010 M Cu²⁺ solution and a zinc electrode immersed in a 0.100 M Zn²⁺ solution. The cell operates at 25 °C. Standard reduction potentials (E°) at 25 °C are: Cu²⁺ + 2e⁻ → Cu  E° = +0.34 V Zn²⁺ + 2e⁻ → Zn  E° = –0.76 V Answer the following:

Question Parts

( a )
Write the overall cell reaction and calculate the standard cell potential (E°cell).
( b )
Using the Nernst equation, determine the cell potential (Ecell) under the given concentrations. (Assume the reaction quotient Q = [Zn²⁺]/[Cu²⁺] and n = 2.)
( c )
If the cell delivers a constant current of 0.50 A for 2.00 h, calculate the mass of copper deposited on the cathode. (Molar mass of Cu = 63.55 g mol⁻¹.)
( d )
The standard entropy change for the cell reaction is ΔS° = –120 J K⁻¹ mol⁻¹. Discuss qualitatively how raising the temperature from 25 °C to 35 °C would affect the cell potential.

Detailed Solution & Marking Scheme

Get the step-by-step solution, key points required by examiners and detailed marking guidance through the Edcrib AI Tutor.

Reveal Answer

About This Question

This is Ijmb Model Questions Vol1 2018 Chemistry Question 10. It is one of the essay questions from the 2018 Ijmb Model Questions Vol1 Chemistry examination.

The question covers Electrochemistry .

View More Ijmb Model Questions Vol1 2018 Chemistry Questions More Ijmb Model Questions Vol1 Practice Questions Back to Questions

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Chat with Support