AIPMT | 2014Ionic EquilibriumMedium
Question
Using the Gibbs energy change, ᐃGo = + 63.3 kJ, for the following reaction,
Ag2CO3(S) ⇋ 2Ag+(aq) + CO32- (aq)
the Ksp of Ag2CO3 (s) in water at 25oC is
(R = 8.314 J K-1 mol-1)
Ag2CO3(S) ⇋ 2Ag+(aq) + CO32- (aq)
the Ksp of Ag2CO3 (s) in water at 25oC is
(R = 8.314 J K-1 mol-1)
Options
A.3.2 × 10-26
B.8.0 × 10-12
C.2.9 × 10-3
D.7.9 × 10-2
Solution
ᐃGo = - 2.303 RT log Ksp
63300 = - 2.303 × 8.314 × 298 log Ksp
Ksp = 8 × 10-12
63300 = - 2.303 × 8.314 × 298 log Ksp
Ksp = 8 × 10-12
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