The solubility of AgCN in a buffer solution of pH =3 is x . The value of x is: [Assume: No cyano complex is formed; K sp ( AgCN ) =2.2 × 10-16 and . K a ( HCN )=6.2 × 10-10]

Question

The solubility of AgCN in a buffer solution of pH =3 is x . The value of x is: [Assume: No cyano complex is formed; K sp ( AgCN ) =2.2 × 10-16 and . K a ( HCN )=6.2 × 10-10] (A) 0.625 × 10-6 (B) 1.9 × 10-5 (C) 2.2 × 10-16 (D) 1.6 × 10-6

Tardigrade Admin · Accepted Answer

( K sp / Ka )=( s 2/( H +)) ; s =√( K sp / K a )( H +) s=√(2.2 × 10-16/6.2 × 10-10) × 10-3 s =1.9 × 10-5

Q. The solubility of $A g CN$ in a buffer solution of $p H = 3$ is $x .$ The value of $x$ is:
[Assume: No cyano complex is formed; $K_{s p} (A g CN)$ $= 2.2 \times 1 0^{- 16}$ and $K_{a} (H CN) = 6.2 \times 1 0^{- 10}]$

$0.625 \times 1 0^{- 6}$

$1.9 \times 1 0^{- 5}$

$2.2 \times 1 0^{- 16}$

$1.6 \times 1 0^{- 6}$

$\frac{K _{s p}}{K a} = \frac{s ^{2}}{( H ^{+} )}; s = \frac{K _{s p}}{K _{a}} (H^{+})$

$s = \frac{2.2 \times 1 0 ^{- 16}}{6.2 \times 1 0 ^{- 10}} \times 1 0^{- 3}$

$s = 1.9 \times 1 0^{- 5}$

Q. The solubility of AgCN in a buffer solution of pH=3 is x. The value of x is: [Assume: No cyano complex is formed; Ksp​(AgCN) =2.2×10−16 and Ka​(HCN)=6.2×10−10]

0.625×10−6

1.9×10−5

2.2×10−16

1.6×10−6