Abstract:Several hydrochemistry problems in researching experiments were commentated and discussed in this paper. These problems included relationship between carbonate equilibrium and temperature, relationship between solubility of carbonate mineral (eg. calcite) and temperature, the dissolution products of calcite and dolomite at different pH value, the measured solubility product is greater than the calculated one, the Cl-complexes, the formed calcite in shallow sea environment and the suggestions for improvements of Shukaliefu's hydrochemical formula. These problems are analyzed and explained and some opinions and suggestions are put forward.