(a(i))[1]
State the mathematical link between $pK_a$ and the acid dissociation constant $K_a$.
(a(ii))[3]
Using the table above, suggest why the $pK_a(1)$ values are all below the $pK_a$ of ethanoic acid, and why they increase as $n$ increases.
(a(iii))[1]
Using the table above, suggest why every $pK_a(2)$ value is greater than the $pK_a$ of ethanoic acid.
(b(i))[2]
Explain the meaning of the term buffer solution.
(b(ii))[2]
Write two equations to show how monosodium butanedioate, $\text{HO}_2\text{CCH}_2\text{CH}_2\text{CO}_2\text{Na}$, functions as a buffer.