STUDY OF INTERACTION OF COMPONENTS IN THE H3BO3–KNO3–H2O SYSTEM

Abstract

The interaction of boric acid with potassium nitrate, the main component of NPK fertilizers, was studied in 0.01 M dilute solutions using the isomolar sequence method. To determine the possible direction of the reaction in the H₃BO₃ – KNO₃ – H₂O system, changes in the properties of pH, density, refractive index, viscosity and crystallization temperature of mixtures of 0.01 M boric acid and potassium nitrate solutions in different ratios were determined. The inflection points of the “composition-pH”, “composition-density”, “composition-viscosity” and refractive index dependences were determined. Regardless of the initial concentration of boric acid, when a small amount of potassium nitrate was added, the composition of the solution changed.