Neco 2019 Chemistry Question 38
Practice objective / multiple choice question 38 from the 2019 Neco Chemistry examination.
A galvanic cell is set up as \(\text{Zn(s)}|\text{Zn}^{2+}(0.010\,\text{M})\,||\,\text{Cu}^{2+}(0.050\,\text{M})|\text{Cu(s)}\) at 25°C. 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 using the Nernst equation. (b) If the cell operates until the concentration of \(\text{Zn}^{2+}\) rises to 0.050 M (the volume of each half‑cell is 1.00 L and the amount of \(\text{Cu}^{2+}\) initially present is sufficient), how many grams of copper are deposited on the cathode? (Molar mass Cu = 63.55 g·mol\(^{-1}\)).
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About This Question
This is Neco 2019 Chemistry Question 38. It is one of the objective questions from the 2019 Neco Chemistry examination.
Difficulty level: Medium .
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