Ionic Equilibrium

A $0.15$ mole of pyridinium chloride has been added to $500\text{ cm}^3$ of $0.2$ M pyridine solution (a base). Assuming there is no change in volume upon mixing(Given: $pK_b$ of pyridine = 8.82), the pH of the resulting solution is

Solubility product of $\mathrm{CaC}_2 \mathrm{O}_4$ at a given temperature in pure water is $4 \times 10^{-9}\left(\mathrm{~mol} \mathrm{~L}^{-1}\right)^2$. Solubility of $\mathrm{CaC}_2 \mathrm{O}_4$ at the same temperature is

A weak acid with \(\mathrm{p} K_a ~5.9\) and weak base with \(\mathrm{p} K_b ~5.8\) are mixed in equal proportions. \(\mathrm{pH}\) of the resulting solution is

Which among the following has highest \(\mathrm{pH}\) ?

\(K_a\) values for acids \(\mathrm{H}_2 \mathrm{SO}_3, \mathrm{HNO}_2, \mathrm{CH}_3 \mathrm{COOH}\) and \(\mathrm{HCN}\) are respectively \(13 \times 10^{-2}, 4 \times 10^{-4}, 1.8 \times 10^{-5}\) and \(4 \times 10^{-10}\), which of the a...

The conjugate base of \(\mathrm{NH}_3\) is

In the reaction
\(\mathrm{B}(\mathrm{OH})_3+2 \mathrm{H}_2 \mathrm{O} \rightarrow\left[B(\mathrm{OH})_4\right]^{-}+\mathrm{H}_2 \stackrel{+}{\mathrm{O}}, \mathrm{B}(\mathrm{OH})_3\)
functions as

Solubility of AgCl is least in