Which of the following salt solutions (0.1 M each) will have the lowest pH values?

A weak acid HX has $p{K}_a=5pK\_\; a=\; 5$. The percent degree of hydrolysis of 0.1 M solution of salt NaX is

2.5 mL of (2/5) M weak monoacidic base ($K_b=1\times {10}^{-12}K\_b=\; 1\; \backslash times10^\{-12\}$ at ${25}^{\circ }C25^\backslash circ\; C$) is titrated with (2/15) M HCl in water at ${25}^{\circ }C25^\backslash circ\; C$. The concentration of $H^{+}H^+$ at equivalence point is ($K_w=1\times {10}^{-14}K\_w\; =\; 1\; \backslash times\; 10^\{-14\}$ at ${25}^{\circ }C25^\backslash circ\; C$)

What is the percentage hydrolysis of NaCN in $N\mathrm{/}80N/80$ solution when the dissociation constant for HCN is $1.3\times {10}^{-9}1.3\; \backslash times\; 10^\{-9\}$ and $K_w=1.0\times {10}^{-14}\mathrm{.}K\_w\; =\; 1.0\; \backslash times\; 10^\{-14\}.$

The pH of a 1M $C{H}_{3}COONaCH\_3COONa$ solution in water will be nearly

Ammonium cyanide is a salt of $N{H}_{4}OH(K_b=1.8\times {10}^{-5})NH\_4OH(K\_b\; =\; 1.8\; \backslash times10^\{-5\})$ and HCN $(K_a=4.0\times {10}^{-10})(K\_a\; =\; 4.0\; \backslash times\; 10^\{-10\}\; )$. The hydrolysis constant of 0.1 M $N{H}_{4}CNNH\_4CN$ at ${25}^{\circ }C25^\backslash circ\; C$ is

It is found that 0.1 M solution of three salts NaX, NaY and NaZ have pH values 7.0, 9.0 and 11.0 respectively. Which of the following order regarding acid strength is correct?

The degree of hydrolysis of ammonium acetate is related to its hydrolysis constant by the expression

The hydrolysis constant of anilinium acetate at ${25}^{\circ }C25^\backslash circ\; C$ is ($K_{a}K\_a$ $(C{H}_{3}COOH)(CH\_3COOH)$ $=1.8\times {10}^{-5}M=\; 1.8\; \backslash times\; 10^\{-5\}M$ and $K_{b}K\_b$ (aniline) $=4.6\times {10}^{-10}M=\; 4.6\; \backslash times10^\{-10\}\; M$)

The expression to compute pH of a solution containing a salt formed from a weak acid and a weak base is