Thursday
December 18, 2014

Homework Help: chemistry

Posted by LALA on Sunday, February 21, 2010 at 1:37pm.

a galvanic cell: A copper electrode is placed in a Cu(NO3)2 electrolyte. An iron electrode is placed in a Fe(NO3)3 electrolyte.
a) What will happen to the voltage if sodium sulfide solution was added to the copper solution(I found that CuS(solid precipitate) will be formed, but i'm thinking it will reduce the voltage but im not sure)

b) What will happen is Na2S was added to the iron solution


if this helps, here are the half reactions for each half cell

Fe^3+ + e ---> Fe ^2+
Cu^2+ + 2e ---->Cu

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