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Solution molarity change in electrolytic cell

  • Thread starter TT0
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TT0
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Homework Statement



The diagram below shows an electrolysis cell which contains 1L of an aqueous 1M copper(II)sulfate solution.

upload_2016-6-30_15-43-12.png


If 0.4 moles of electrons pass through the cell, the concentration of copper ions after passage of the charge will be

A) 0.4 M

B) 0.8 M

C) 1.0 M

D) 1.2M.

2. Homework Equations



The Attempt at a Solution



I chose C because if 0.4 moles of electrons pass through the cell, then that means 0.2 moles of Cu2+ will be deposited into the solution from the anode and that means 0.2 moles of Cu2+ will be absorbed by the cathode. This gives no net change in molarity in the solution. Is this correct?

Cheers!
 

Answers and Replies

  • #2
Borek
Mentor
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2,752
Looks OK.
 
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  • #3
TT0
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Thanks!
 

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