Waec Model Questions Vol1 2020 Chemistry Question 22

Practice objective / multiple choice question 22 from the 2020 Waec Model Questions Vol1 Chemistry examination.

Waec Model Questions Vol1 2020 Chemistry Objective / Multiple Choice Medium Difficulty
Question 22 WAEC_MODEL_QUESTIONS_VOL1 • 2020 • CHEMISTRY • objective

A galvanic cell is constructed as Zn(s) | Zn²⁺ (0.010 M) || Cu²⁺ (0.10 M) | Cu(s) at 25 °C. Standard electrode potentials are E°(Cu²⁺/Cu)=+0.34 V and E°(Zn²⁺/Zn)=-0.76 V. (a) Calculate the cell EMF under the given concentrations. (b) If 0.500 C of charge passes through the cell, how many milligrams of copper are deposited on the copper electrode?

Answer Options

Correct Answer A. a) 1.13 V; b) 0.165 mg of copper
B. a) 1.20 V; b) 0.180 mg of copper
C. a) 1.05 V; b) 0.210 mg of copper
D. a) 0.95 V; b) 0.120 mg of copper
Correct Answer
A
Correct Option:
a) 1.13 V; b) 0.165 mg of copper

About This Question

This is Waec Model Questions Vol1 2020 Chemistry Question 22. It is a objective / multiple choice question from the 2020 Waec Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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