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The maximum amount of silver cyanide that will dissolve in a 0.140 M silver nitrate solution...

The maximum amount of silver cyanide that will dissolve in a 0.140 M silver nitrate solution is _____ M.

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Answer #1

AgCN is a sparingly soluble salt with Ksp = 1.6x 10-14

AgNO3 is a soluble salt . So due to the common ion effect the solublity of AGCN is further decreases. However Ksp being the equilibrium constant remains same at same temeperature

AgCN (s) <---------------> Ag+ (aq) + CN-(aq)  

s 0.14 0 initial concentration in the preaence of AgNO3

- 0.14+s s at equilibrium

- 0.14 s as s very small compared to 0.14

Thus Ksp = [Ag+] [CN-] = 0.14 x s = 1.6x10-14

and [CN-] = s = 1.14x10-13 M

This is the maximum amount that can be soluble in 0.14M AgNO3 solution.

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