Chemistry - GOC Question with Solution | TestHub

Compare the conjugate bases : chloroacetate is stabilised by the -I effect of chlorine ($\mathrm{p}{K}_{\mathrm{a}}$ 2.87); formate has no electron-donating group ($\mathrm{p}{K}_{\mathrm{a}}$ 3.75); acetate and propanoate carry electron-donating alkyl groups, the larger ethyl donating slightly more ($\mathrm{p}{K}_{\mathrm{a}}$ 4.76 and 4.87). Hence I $>$ III $>$ II $>$ IV.