Determine the number of moles of Agl which may be dissolved in 1.0 litre of 1.0M CN^(-)solution ,K_(sp)for Agl and K_ffor [ Ag (CN)_2]^(-)" are "1.2 xx 10 ^(-17)M^(2) and 7. 1 xx 10 ^(-19)respectively. If answer is 4.9 xx 10 ^(x)then x =__________?

Determine the number of moles of Agl which may be dissolved in 1.0 lit

1.	Determine the number of moles of Agl which may be dissolved in 1.0 litre of 1.0M CN^(-)solution ,K_(sp)for Agl and K_ffor [ Ag (CN)_2]^(-)" are "1.2 xx 10 ^(-17)M^(2) and 7. 1 xx 10 ^(-19)respectively. If answer is 4.9 xx 10 ^(x)then x =__________?
Answer» Solution :`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) `