Neco Model Questions Vol1 2021 Chemistry Question 28

Practice objective / multiple choice question 28 from the 2021 Neco Model Questions Vol1 Chemistry examination.

Neco Model Questions Vol1 2021 Chemistry Objective / Multiple Choice Medium Difficulty
Question 28 NECO_MODEL_QUESTIONS_VOL1 • 2021 • CHEMISTRY • objective

A 250 mL solution of 0.200 M CuSO₄ is mixed with excess solid Zn metal. (a) Write the balanced redox equation for the reaction. (b) Calculate the mass of copper metal deposited when 5.00 g of Zn are added, assuming the reaction goes to completion. (c) Using the standard reduction potentials \(E^{\circ}(Cu^{2+}/Cu)=+0.34\) V and \(E^{\circ}(Zn^{2+}/Zn)=-0.76\) V, determine the standard cell potential and comment on the spontaneity of the reaction.

Answer Options

A. Balanced equation: Zn + Cu^{2+} → Zn^{2+} + Cu; mass of Cu deposited = 2.55 g; E°_{cell}=+1.10 V (spontaneous)
B. Balanced equation: Zn + Cu^{2+} → Zn^{2+} + Cu; mass of Cu deposited = 3.18 g; E°_{cell}=+1.10 V (non-spontaneous)
C. Balanced equation: Zn + Cu^{2+} → Zn^{2+} + Cu; mass of Cu deposited = 3.18 g; E°_{cell}=+0.58 V (spontaneous)
Correct Answer D. Balanced equation: Zn + Cu^{2+} → Zn^{2+} + Cu; mass of Cu deposited = 3.18 g; E°_{cell}=+1.10 V (spontaneous)
Correct Answer
D
Correct Option:
Balanced equation: Zn + Cu^{2+} → Zn^{2+} + Cu; mass of Cu deposited = 3.18 g; E°_{cell}=+1.10 V (spontaneous)

About This Question

This is Neco Model Questions Vol1 2021 Chemistry Question 28. It is one of the objective questions from the 2021 Neco Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

View More Neco Model Questions Vol1 2021 Chemistry Questions More Neco 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