If a 0.10 molar solution is made of each of the weak acids below, which of the four solutions would have the highest concentration of un-dissociated acid molecules (proton still on)? A. alloxanic acid, K, - 2.3 x 10-7, pk, = 6.64 B. propanoic acid, Ka = 1.4 x 10-5, pka = 4.85 C. glyoxylic acid, Ka = 6.6 x 104, pkg = 3.18 D. malonic acid, Ka = 1.5 x 10-3, pka = 2.82
