An electrochemical cell consists of the half cells Cu+2|Cu and Ag+|Ag. What are

Question

An electrochemical cell consists of the half cells Cu+2|Cu and Ag+|Ag. What are the standard reduction potentials for the half reactions for the reductions?
I know reductions are: Cu+2 +2e- => Cu , Ag+ +1e- => Ag . After writing the half reactions that occured at the anode and the cathode write the balanced equation for this reaction? How many electrons are transferred during this reaction and write the reaction quotient , Q, for this reaction? Sketch and label an electrochemical cell for Cu+2|Cu and Ag+|Ag. Show the direction of the flow of electrons in the external circuit for the spontaneous reaction?

Explanation / Answer

Cu-2e- -----> Cu+2 E 0 = -0.34 V at anode oxidation reaction

Ag+ +e- ------>Ag E0 = 0.84v at cathode reduction reaction

Cu-2e- -----> Cu+2

2Ag+ +2e- ------>2Ag

over all reaction =Cu+ 2Ag+ -----> Cu+2 +2 Ag two electrons are involve in the reaction

   Q = [Cu+2][Ag]2/[Cu][Ag+]2

electrons are flow from anode to cathode

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