Solubility and activity coefficients of acidic and basic nonelectrolytes in aqueous salt solutions.: 2.: Solubility and activity coefficients of suberic, azelaic, and sebacic acids in NaCl(aq), (CH3)4NCl(aq), and (C2H5)4NI(aq) at different ionic strengths and at t=25 °C

The solubility of three dicarboxylic acids, (COOH)-(CH2)(n)-(COOH) (n = 6, 7, 8), was determined in NaCl(aq) (0.5 to 4.5) mol center dot L-1, (CH3)(4)NCl(aq) (0.25 to 3) mol center dot L-1, (C2H5)(4)NI (0.25 to 1) mol center dot L-1, and in pure water at t = 25 degrees C. The solubility trend is (C2H5)(4)NI > (CH3)(4)NCl > NaCl. The Setschenow constants and activity coefficients of neutral species were calculated from these data. To fully characterize the acid-base behavior of above dicarboxylic acids, the protonation constants were determined in the same conditions. From these data, together with solubility ones, Pitzer and SIT parameters were calculated.