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A solution of 0 .1 weak base (B )is titr...

A solution of 0 .1 weak base (B )is titrated with 0.1 M of a strong acid ( HA) . The variation of pH of the solution will be the volume of HA added is shown in the figure below. What is the `pK_b` of the base ? The neutralization reaction is given by `B+HA rarrHA rarrBH^(+)+A^(-)`

Text Solution

Verified by Experts

The correct Answer is:
`03.00`
At 3 ml pH of solution is 11
`B + HA rarr BH^(+) +A^(-)`
at 3 ml best butter action is shown
at 3 ml best buffer action is shown
So `P_(OH) =P_(K_b)=3` (As basic buffer is formed )
So `P_(K_b)=3`
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