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The simultaneous solubility of Ag CN (K(...

The simultaneous solubility of Ag CN `(K_(f) =2.5 xx 10^(-16) ) and AgCl (Ksp =1.6 xx 10^(-10 ) ) ` in 1. 0M `NH_3` (aq) are respectively : `[Given ,K_f [Ag(NH_3)_2^(+) ]= 10^(7) ]`

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The correct Answer is:
1
`Agl hArr Ag^(+) I^(-) ,Ksp`
` (Ag^(+) +2CN^(-) hArr [Ag(CN)_2]^(-) ,K_f)/( underset( 1-2s) (Agl)+2CN^(-) hArr [Ag(CN)_2]^(-) +I^(-) ,K =KspK_f) `
` ((s)/(1-2s) )^(2) =Ksp, K_f =1.2 xx 10^(-17) xx 7.1 xx 10 ^(19) `
` rArr (s)/( 1-2s) =sqrt(8.52 xx 10 ^(2)) =29`
` 59S =29 rArr S =0.49 rArr S = 4.9 xx 10 ^(-1) `
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