CBSE Class 12-science Answered
Why Agcl is soluble in NH3
Asked by Balaraman Saptharishi | 11 Aug, 2012, 05:58: PM
Expert Answer
AgCl is an insoluble or sparingly soluble salt. The following equilibium exists when AgCl is added in to water:
AgCl(s) <--> Ag+(aq) + Cl-(aq) --(1)
Since AgCl is insoluble, the equilibrium lies to the left.
In aq NH3, :NH3 acts as a ligand and forms a complex with Ag+ :
Ag+(aq) + 2NH3(aq) <-->[Ag(NH3)2]+ (aq) --(2)
Reaction(2) lowers the concentration of Ag+ and shifts the equilibrium of (1) to the left, dissolving AgCl.
AgCl(s) <--> Ag+(aq) + Cl-(aq) --(1)
Since AgCl is insoluble, the equilibrium lies to the left.
In aq NH3, :NH3 acts as a ligand and forms a complex with Ag+ :
Ag+(aq) + 2NH3(aq) <-->[Ag(NH3)2]+ (aq) --(2)
Reaction(2) lowers the concentration of Ag+ and shifts the equilibrium of (1) to the left, dissolving AgCl.
Answered by | 11 Aug, 2012, 08:44: PM
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