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![[Post New]](/templates/default/images/icon_minipost_new.gif) 13 Jan 2008 21:32:00 IST
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Q. The solubility of sparingly soluble AgCl can be increased with addition of: a. aq. NH3 b. aq. NaCN c. Both d. None of these. Explain with proper solution.
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14 Jan 2008 17:14:51 IST
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i guess the following could be the ans. ans:: a. bcoz' Ag forms a complex with aq.NH3 i.e. [Ag(NH3)2]+
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14 Jan 2008 17:30:27 IST
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agcl can also react with nacn to from agcn and nacl.So ithink it will be both.,
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16 Jan 2008 08:58:13 IST
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does the ability of Ag to form complexes actually increase its solubility?
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16 Jan 2008 09:22:59 IST
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The answer is aq NH3 as it forms the complex (Ag(NH3)2)+ and yes complexes increase stability coz if we think of it is nothing but a equilibrium reaxn with a very high Kc. Hence Solubilities inc with complexes. But it need not always be so in cases where reaxn depend s on other factors more or that the complex formed is unstable Eg. (Cd(CN)4)3-
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