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Calculate solubility of AgCN (K(sp)= 4 x...

Calculate solubility of AgCN `(K_(sp)= 4 xx 10^(-16))` in a buffer solution of PH=3. `[(K_a)_(HCN)= 4 xx 10^(-10)]`.

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The correct Answer is:
`2.1 xx 10^(-5)`
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