which electride will be positive | right |
whate voltage will the volto meter shows | 0.020V |
Concentration of M3+ at anode = 0.450M × 2 = 0.900M
Concentratiom of M3+ at cathode = 4.50M × 2 = 9.00M
M(s) -------> M3+(aq) + 3e at anode
M3+(aq) (9.00M) + 3e ------> M(s) at cathode
number of electron transfer , n = 3
reaction quotient,Q= [M3+]low/[M3+]high
Q = 0.900M/9.00M = 0.1
Nernst equation for concentration cell at 25℃ is
Ecell = - (0.0592V/n)logQ
Ecell = - (0.0592V/3)log(0.1)
Ecell = 0.020V
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