Gce Model Questions Vol1 2022 Chemistry Question 49
Practice objective / multiple choice question 49 from the 2022 Gce Model Questions Vol1 Chemistry examination.
Consider a galvanic cell: \(\text{Zn}| \text{Zn}^{2+} (0.010\ \text{M}) || \text{Cu}^{2+} (0.10\ \text{M}) | \text{Cu}\). Standard electrode potentials are \(E^\circ_{\text{Zn}^{2+}/\text{Zn}} = -0.76\ \text{V}\) and \(E^\circ_{\text{Cu}^{2+}/\text{Cu}} = +0.34\ \text{V}\). (a) Calculate the cell EMF at \(25^\circ\text{C}\) using the Nernst equation. (b) If a current of \(0.500\ \text{A}\) is passed for \(30\ \text{min}\), how many grams of copper are deposited on the copper electrode? (c) Assuming the zinc ion concentration remains unchanged and the copper ion concentration decreases accordingly, determine the new EMF of the cell.
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This is Gce Model Questions Vol1 2022 Chemistry Question 49. It is one of the objective questions from the 2022 Gce Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
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