March 1, 2017

Homework Help: chemistry

Posted by Mark on Saturday, July 17, 2010 at 11:35am.

A voltaic cell is contructed in which a copper wire is placed in a 1.0 M Cu(NO3)2 solution and a strip of gold i placed in a 1.0 M AuNO3 solution. The measured potential of the cell is found to be 1.36V and the copper electrode is negative. The Ered for the Cu2+/Cu half- cell is +0.34

a) Since the copper electrode is negative, oxidation takes place at the copper electrode. Write the oxidation half-reaction for the Cu2+/Cu half-cell and indicate its standard oxidation potential, Eox

b)Write the half-reaction for the Au2+/Au half-cell.

c) write the overall balanced oxidation-reduction and indicate the standard cell potential Ecell

d) Calculate the standard reduction potential Ered for the Au2+/Au half-cell

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