2Au3 3MG 2Au 3Mg2Solution 2Au3 6e 2Au Eo 150 V 3Mg 3

2Au^3+ + 3MG <----> 2Au + 3Mg^2+

Solution

2Au3+ + 6e- ==> 2Au . . .Eo = +1.50 V
3Mg ==> 3Mg2+ + 6e- . ..Eo = +2.37 V
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2Au3+ + 3Mg ==> 2Au + 3Mg2+ . . .Eo = +3.87 V

now dG = -nfE0

here n = 6

dG = -2240730 J = -2240.73 KJ