Neco 2022 Chemistry Question 6

Practice objective / multiple choice question 6 from the 2022 Neco Chemistry examination.

Neco 2022 Chemistry Objective / Multiple Choice Medium Difficulty
Question 6 NECO • 2022 • CHEMISTRY • objective

An electrochemical cell is constructed as follows: Zn(s) | Zn^{2+}(0.010\,M) || Cu^{2+}(x\,M) | Cu(s) at 25\,°C. The standard electrode potentials are E°(Zn^{2+}/Zn) = -0.76\,V and E°(Cu^{2+}/Cu) = +0.34\,V. The cell emf measured under these conditions is 1.05\,V. (a) Calculate the concentration \(x\) of Cu^{2+} in the cell. (b) If a charge of 0.500\,C passes through the cell, how many grams of copper are deposited on the copper electrode?

Answer Options

Correct Answer A. Cu^{2+} concentration = 9.7\times10^{-5}\,M; mass of Cu deposited = 1.65\times10^{-4}\,g
B. Cu^{2+} concentration = 9.7\times10^{-5}\,M; mass of Cu deposited = 1.65\times10^{-5}\,g
C. Cu^{2+} concentration = 1.0\times10^{-4}\,M; mass of Cu deposited = 1.70\times10^{-4}\,g
D. Cu^{2+} concentration = 9.7\times10^{-4}\,M; mass of Cu deposited = 1.65\times10^{-3}\,g
Correct Answer
A
Correct Option:
Cu^{2+} concentration = 9.7\times10^{-5}\,M; mass of Cu deposited = 1.65\times10^{-4}\,g

About This Question

This is Neco 2022 Chemistry Question 6. It is one of the objective questions from the 2022 Neco Chemistry examination.

Difficulty level: Medium .

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