Question: 2. (10%) (a) A common ion selective electrode for Pb2+ is composed of a mixed Ag2S, PbS crystalline membrane. It is important to the proper

2. (10%) (a) A common ion selective electrode for Pb2+ is

2. (10%) (a) A common ion selective electrode for Pb2+ is composed of a mixed Ag2S, PbS crystalline membrane. It is important to the proper functioning of the electrode that PbS is more soluble than Ag2S. Why? (b) When 1.00103MPb2+ is on the left side of the membrane and 2.00105M Pb2+ is on the right, which has more positive potential, estimate the potential difference. (2.303RT/F=0.05915 volt at 25C) EISE=EISE0zFRTln[ax+kxxay]F=96485C/mol;R=8.314JK1mol1

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