Ionic Equilibrium

Which of the following molecules acts as a Lewis acid?

Which one of the following molecular hydrides acts as a Lewis acid?

$\mathrm{pH}$ of a saturated solution of $\mathrm{Ba}\left(\mathrm{OH}\right)_{2}$ is $12$ . The value of its $K_{\mathrm{sp}}$ is

20 mL of 0.1 M acetic acid is mixed with 50 mL of potassium acetate. $K_\alpha$ of acetic acid $=1.8 \times 10^{-5}$ at $27^{\circ} \mathrm{C}$. Calculate the concentration of potassium acetate if pH of mixture is 4.8 .

The pH of 1 N aqueous solutions of HCl , $\mathrm{CH}_3 \mathrm{COOH}$ and HCOOH follows the order:

What is $\left[\mathrm{NH}_4^{+}\right]$in a solution that is $0.02 \mathrm{M} \mathrm{NH}_3$ $0.01 \mathrm{M} \mathrm{KOH} ?\left[K_b\left(\mathrm{NH}_3\right)=1.8 \times 10^{-5}\right]$

$100 \mathrm{~mL}$ of $2 \mathrm{M}$ of formic acid $\left(\mathrm{p} K_a=3.74\right)$ is neutralise by $\mathrm{NaOH}$, at the equivalence point $\mathrm{pH}$ is

The solubility of silver bromide in hypo solution involves the formation of:

A solution of $\mathrm{NH}_{4} \mathrm{Cl}$ and $\mathrm{NH}_{3}$ has $\mathrm{pH}=8.0 .$ Which of the following hydroxides may be precipitated when this solution is mixed with equal volume of 0.2 M of metal ion?

Given $\text{pH}$ of a solution $'A'$ is $'3'$and it is mixed with another solution $'B'$ having $\text{pH}$ $'2'$. If both solutions are mixed, the resultant $\text{pH}$ of the solution will be (Assume concentration…

$\text{pH}$ of a saturated solution of $\text{Ba} {(\text{OH})}_{2}$ is $12$ . The value of its ${K}_{\text{sp} }$ is

${\text{BF} }_{3}$ is an acid, according to