Consider a galvanic cell at 298 K made from a silverelectrode in 0.50 M AgNO 3 (

Question

Consider a galvanic cell at 298 K made from a silverelectrode in 0.50 M AgNO3 (aq) and a cadmiumelectrode in 0.010 M cd(NO3)2 (aq). Write theoverall reaction that occurs and determine the cellpotential. overall reaction:______________________ cell potential:________________________V *********WILL RATE********* Consider a galvanic cell at 298 K made from a silverelectrode in 0.50 M AgNO3 (aq) and a cadmiumelectrode in 0.010 M cd(NO3)2 (aq). Write theoverall reaction that occurs and determine the cellpotential. overall reaction:______________________ cell potential:________________________V *********WILL RATE*********

Explanation / Answer

We Know that :     Oxidation half -cell :           Cd------> Cd+2 + 2e      Reduction half - cell :          Ag+ + e -------> Ag      Net Cell Reaction :         Cd + 2Ag+ -------> Cd+2 + 2 Ag            E0cell = E0cathode - E0anode                       = 0.7994 - ( - 1.21 ) V                        = + 2.0094 V          According to Nernest Equation :             Ecell = E0cell -0.059 / 2 log [ Cd+2 ] / [Ag+ ]2                       = 2.0094 V - 0.059 / 2 log [ 0.010 M ] / [0.50 M ] 2                         = 2.05063 V                       = 2.0094 V - 0.059 / 2 log [ 0.010 M ] / [0.50 M ] 2                         = 2.05063 V

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