1.

Concentration of CN in 0.1 M HCN is [K_(a) = 4 xx 10^(-10)]

Answer»

`2.5 xx 10^(-6)M`
`4.5 xx 10^(-6)M`
`6.3 xx 10^(-6)M`
`9.2 xx 10^(-6)M`

SOLUTION :CONCENTRATION of `CN^(-) = sqrt(K_(a)C) = 6.3 xx 10^(-6)`.


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