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A copper rod was purified by using it as the anode in the electrolysis of a 1.0 M copper II) sulphate solution. The cathode was made of pure copper. The mass of the cathode efore the electrolysis was 0.52 g. After the electrolysis, mass of the cathode was 1.75 a. If the current used was 1.5 A, for how many minutes was the 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 by using it as the anode in the electrolysis of a 1.0 M copper II) sulphate solution. The cathode was made of pure copper. The mass of the cathode efore the electrolysis was 0.52 g. After the electrolysis, mass of the cathode was 1.75 a. If the current used was 1.5 A, for how many minutes was the 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 Practice
Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter18: Electrochemistry
Section: Chapter Questions
Problem 18.77QE: A solution contains the ions H+, Ag+, Pb2+, and Ba2+, each at a concentration of 1.0 M. (a) Which of...
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A copper rod was purified by using it as the anode in the electrolysis of a 1.0 M copper (II) sulphate solution. The cathode was made of pure copper. The mass of the cathode before the electrolysis was 0.52 g. After the electrolysis, mass of the cathode was 1.75 g. a. If the current used was 1.5 A, for how many minutes was the 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.
Transcribed Image Text:A copper rod was purified by using it as the anode in the electrolysis of a 1.0 M copper (II) sulphate solution. The cathode was made of pure copper. The mass of the cathode before the electrolysis was 0.52 g. After the electrolysis, mass of the cathode was 1.75 g. a. If the current used was 1.5 A, for how many minutes was the 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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