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 one of the objective questions from the 2020 Waec Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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