What is the value of the equilibrium constant at 25°C for the reaction between each of the following?
(a) Al(s) and Cd2+(aq)
(b) Cr(s) and Cu2+(aq)
2 Al ---------->2 Al+3 + 6e- E0 = 1.66V
3Cd+2 + 6e- ------> 3Cd E0 = 0.40V
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2Al(s) + 3Cd+2 (aq) ------> 2Al+3 + 3Cd E0 = 2.06v
G0 = -nE0 cell*F
= -6*2.06*96500 = -1192740J
G0 = -RTlnK
-1192740 = -8.314*298*2.303logK
logK = 1192740/5705.8483 = 209
K = 10209
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