Chemistry - Ionic Equilibrium Question with Solution | TestHub

To get a buffer solution at maximum capacity the molar ratio of ${\mathrm{CH}}_3\mathrm{COOH}$ and NaOH should be $2:1$.

pH of a solution formed by mixing equimolar quantities of HCOOH and HCl will be less than that of a solution formed from equimolar quantities of HCOOH and HCOONa.

When ${\mathrm{Na}}_3{\mathrm{PO}}_4(\mathrm{aq})$ is titrated with $\mathrm{HCl}(\mathrm{aq})$, the pH of solution at $2^{\text{nd }}$ equivalence point is $\frac{1}{2}\left({\mathrm{pK}}_{{\mathrm{a}}_1}+{\mathrm{pK}}_{{\mathrm{a}}_2}\right)$.

Phenolphthalien changes its colour from pink to colourless at first equivalence point during titration of ${\mathrm{Na}}_2{\mathrm{CO}}_3$ and HCl .