Neco Model Questions Vol1 2019 Chemistry Question 18
Practice objective / multiple choice question 18 from the 2019 Neco Model Questions Vol1 Chemistry examination.
A piece of impure copper weighing 5.00 g is dissolved in excess 0.50 M nitric acid to give a solution of \(\mathrm{Cu^{2+}}\). The solution is then electrolysed using a constant current of 0.25 A for 30 min. The current efficiency for copper deposition is 90 %. For the cathodic reaction \(\mathrm{Cu^{2+} + 2e^- \rightarrow Cu}\), calculate the mass of copper deposited on the cathode (in grams). (Molar mass Cu = 63.55 g mol\(^{-1}\), Faraday constant = 96500 C mol\(^{-1}\)).
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About This Question
This is Neco Model Questions Vol1 2019 Chemistry Question 18. It is one of the objective questions from the 2019 Neco Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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