MCQ
$0.01\, M \,HA(aq.)$ is $2\%$ ionized, $[OH^-]$ of solution is :-
- A$2 \times 10^{-4}$
- B$10^{-8}$
- ✓$5 \times 10^{-11}$
- D$5 \times 10^{-12}$
✓
Answer
Correct option: C.
$5 \times 10^{-11}$
c
$\left[\mathrm{H}^{+}\right]_{\mathrm{wea} \mathrm{k} \text { acid }}=\mathrm{C} \alpha=0.01 \times\left(\frac{2}{100}\right)$
$\left[\mathrm{H}^{+}\right]_{\mathrm{wea} \mathrm{k} \text { acid }}=\mathrm{C} \alpha=0.01 \times\left(\frac{2}{100}\right)$
$=2 \times 10^{-4}$
$\left[\mathrm{H}^{+}\right] \times\left[\mathrm{OH}^{-}\right]=\mathrm{Kw}=10^{-14}$
$\therefore \quad\left[\mathrm{OH}^{-}\right]=\frac{10^{-14}}{2 \times 10^{-4}}=5 \times 10^{-11}$
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
Which of the following is an endothermic process?
Which has $s{p^3}$ hybridization of central atom
→Which of the following set of quantum numbers are allowed ?
An electron has principal quantum number $3$. The number of its $(i)$ sub-shells and $(ii) $ orbitals would be respectively
→The number of molecules/ion/s having trigonal bipyramidal shape is ........ .
→$\mathrm{PF}_5, \mathrm{BrF}_5, \mathrm{PCl}_5,\left[\mathrm{PtCl}_4\right]^{2-}, \mathrm{BF}_3, \mathrm{Fe}(\mathrm{CO})_5$
Which is not a electrophile
Chemical bond implies
Consider the following reactions is correct
In the above compound, how many sites are available for the attack of $CH_3O^-$ ?
→The oxide of a metal has $32\%$ oxygen. Its equivalent weight would be
→