NEET levelSingle correct optionDifficulty 1 of 3ec089
For the cell Cu∣CuX2+(0.01M)∣∣CuX2+(1.0M)∣Cu at 298 K (take 2.303RT/F=0.0591V), which statement is correct?
AEMF =0.0591V; the left electrode is the anode
BEMF =0.118V; the left electrode is the anode
CEMF =0.0591V; the right electrode is the anode
DEMF =0 because both electrodes are copper
Answer: A
In a concentration cell the dilute side is the anode (metal dissolves there) and the concentrated side is the cathode. E=20.0591log0.011.0=0.02955×2=0.0591V. The EMF is not zero because the two half cells have different [CuX2+].