A solution of 0 . 1 M weak base ( B ) is titrated with 0 . 1 M of a strong acid ( HA ) . The variation of pH…

A solution of $0.1 \mathrm{M}$ weak base $\left(\mathrm{B}\right)$ is titrated with $0.1 \mathrm{M}$ of a strong acid $\left(\mathrm{HA}\right)$. The variation of $\mathrm{pH}$ of the solution with the volume of $\mathrm{HA}$ added is shown in the figure below. What is the ${\mathrm{pK}}_{\mathrm{b}}$ of the base? The neutralization reaction is given by$\mathrm{B}+\mathrm{HA}\to {\mathrm{BH}}^{+}+{\mathrm{A}}^{-}$.

Solution

Asked in: JEE Advanced 2020 (Paper 2)

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