A copper rod was purified using an electrolysis method consisting of a 1.0 M solution of copper (II) sulfate and pure copper as the cathode. The mass of the cathode before electrolysis was 0.52 grams. After electrolysis, the mass of the cathode was 1.75 grams. a) If the current used was 1.5 A, for how many minutes was electrolysis performed? b) Calculate the magnitude of the current that must be used so that the time of electrolysis can be shortened to 20 minutes.
A copper rod was purified using an electrolysis method consisting of a 1.0 M solution of copper (II) sulfate and pure copper as the cathode. The mass of the cathode before electrolysis was 0.52 grams. After electrolysis, the mass of the cathode was 1.75 grams. a) If the current used was 1.5 A, for how many minutes was electrolysis performed? b) Calculate the magnitude of the current that must be used so that the time of electrolysis can be shortened to 20 minutes.
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter20: Chemistry Of The Metals
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Problem 10QAP: Zinc is produced by electrolytic refining. The electrolytic process, which is similar to that for...
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A copper rod was purified using an electrolysis method consisting of a 1.0 M solution of
copper (II) sulfate and pure copper as the cathode. The mass of the cathode before
electrolysis was 0.52 grams. After electrolysis, the mass of the cathode was 1.75 grams.
a) If the current used was 1.5 A, for how many minutes was electrolysis performed?
b) Calculate the magnitude of the current that must be used so that the time of
electrolysis can be shortened to 20 minutes.
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