MCQ
When a salt of weak acid and weak base is dissolved in water at $25\,^oC$, the $pH$ of the resulting solution will always :-
- ABe $7$
- BBe greater than $7$
- CBe less than $7$
- ✓Depend upon $K_a$ and $K_b$ values
✓
Answer
Correct option: D.
Depend upon $K_a$ and $K_b$ values
d
$\mathrm{pH}=7+\frac{1}{2} \mathrm{pKa}-\frac{1}{2} \mathrm{pkb}(\mathrm{for} \mathrm{WA}+\mathrm{WB})$
$\mathrm{pH}=7+\frac{1}{2} \mathrm{pKa}-\frac{1}{2} \mathrm{pkb}(\mathrm{for} \mathrm{WA}+\mathrm{WB})$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
What is the oxidation number of $O$ in a diatomic molecule $\ce{(O_2)}\ ?$
→Propene when heated with chlorine at about ${500\,^o}C$ forms
→One litre hard water contains $12.00$ $mg$ $M{g^{2 + }}$ milli equivalent of washing soda required to remove its hardness is
→The major product $[B]$ in the following sequence of reactions is
→$\begin{array}{*{20}{c}}
{C{H_3} - C = CH - C{H_2}C{H_3}} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{CH{{(C{H_3})}_2}\,\,\,\,\,\,\,\,\,\,}
\end{array}\xrightarrow[{(ii)\,{H_2}{O_2},O{H^ - }}]{{(i)\,{B_2}{H_6}}}[A]$$\xrightarrow[\Delta ]{{dil.\,{H_2}S{O_4}}}[B]$
Dipole-induced dipole interactions are present in which of the following pairs
For the dissociation reaction ${N_2}{O_4}\,(g)\,\, \rightleftharpoons \,2N{O_2}(g),$ the degree of dissociation $(\alpha )$ in terms of $K_p$ and total equilibrium pressure $P$ is
→The probability density plots of $1s$ and $2s$ orbitals are given in figure.
The density of dots in a region represents the probability density of finding electrons in the region.
On the basis of above diagram which of the following statements is incorrect?
→The density of dots in a region represents the probability density of finding electrons in the region.
On the basis of above diagram which of the following statements is incorrect?
To prepare a pure sample of $n-$ hexane using sodium metal as one reactant, the other reactant will be
→The major product of the following reaction is $P$. Number of oxygen atoms present in product ' $\mathrm{P}$ ' is . . . . . . . . . .(nearest integer).
→When a chemical bond is formed, there is decrease in :