at 30 degree celsius , the solubility of ag2co3 (Ksp= 8 * 10^-12) would be maximum in 1 litre of ? a) pure water b) 0.05 M NH3 c)0.05 agno3 d)0.05m na2co3 Please explain
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a)In pure water
Ag2CO3↔2Ag^+ +CO3^2-
b)In NH3:
Ag2CO3↔2Ag^+ +CO3^2-
2Ag+ +4NH3↔2Ag(NH3^2+
Overall:Ag2CO3+4NH3↔2Ag(NH3^2+ +CO3^2-)
Here a complex formation is taking place,due to the formation of complex the reaction between silver ionsa & ammonia shifts the solubility equilibria in the forward direction,which in turns increases the solubility.
c)& d):Due to the presence of common ion in these reactions,the solubility is suppressed.
Therefore,Ag2CO3 will be most soluble in NH3.
Hence correct answer is (b)
Ag2CO3↔2Ag^+ +CO3^2-
b)In NH3:
Ag2CO3↔2Ag^+ +CO3^2-
2Ag+ +4NH3↔2Ag(NH3^2+
Overall:Ag2CO3+4NH3↔2Ag(NH3^2+ +CO3^2-)
Here a complex formation is taking place,due to the formation of complex the reaction between silver ionsa & ammonia shifts the solubility equilibria in the forward direction,which in turns increases the solubility.
c)& d):Due to the presence of common ion in these reactions,the solubility is suppressed.
Therefore,Ag2CO3 will be most soluble in NH3.
Hence correct answer is (b)
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