Abstract

The different ways of pH calculation are described. The systematic errors and problems of experimental and theoretical correlation are discussed the best way of water properties calculations are proposed – mass balance numerical calculation. Behaviour prediction of groundwater properties is important at day-to-day life in the fields of oil companies, civil engineering and so on. The different types of assumptions were applied for the prediction of properties by researchers. At the same time, empirical parameters numbers have some portion of inaccuracy due to methods precession. The general method of water properties calculation is proposed to combine researchers and increase the efficiency of development. There are two great assumptions known so far for highly diluted solutions: pH is dependent on strong base (or acid) concentration or water equilibrium prevails [1]. The next step of calculation methods improvement is the precise calculation of all anions and cations in the solution. The dissociation equilibriums have taken place.