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6-2.Equilibrium-II (Ionic Equilibrium)
medium
Write characteristic and uses of weak base equilibrium constant ${K_b}$.
Option A
Option B
Option C
Option D
Solution
$(i)$ If the value of $K_{b}$ is more than base is more strong. $(ii)$ $K_{b}$ is a dimensionless quantity.
$(iii)$ With the help of $\mathrm{K}_{b}$, calculate $\left[\mathrm{OH}^{-}\right]$of weak base and then $pOH.$ $(iv)$ The ionization degree $(\alpha)$ of base can be calculated by value of $K_{b}$.
$(v)$ $\mathrm{pK}_{b}$ is calculate by using the value of $\mathrm{K}_{b^{*}}$
$\mathrm{pK}_{b}=-\log \left(\mathrm{K}_{b}\right)$
If $\mathrm{pK}_{b}$ value is more then base is less strong.
| $\mathrm{K}_{b}$ | $1 \times 10^{-1}$ | $1 \times 10^{-2}$ | $1 \times 10^{-3}$ |
| $\mathrm{pK}_{b}$ | $+1$ | $+2$ | $+3$ |
Standard 11
Chemistry
