Xác định các tham số cân bằng axit-bazơ trong dung dịch nước của các đa axit-bazơ

This paper deals with the non-linear least square algorithm applied to determine simultaneously equilibrium constants lg 1, lg 2; activity coefficients of ions (lg HA-, lg A2-) and of neutral molecule (lgfH2A) for aqueous solutions of fumaric, sucinat acids from pH values at different ionic forces establishzed by inert salts NaCl, NaClO, KCl, KNO3 and NaNO3. It has been shown that the calculation results of lgfH2A, lg HA-, lg A2- and lg 1, lg 2 are in a good agreement with experimental data as long as the experimental INPUT data have high precision.