INFLUENCE OF ADDITIONAL CLEANING ON THE HARDNESS OF DRINKING WATER
The content of calcium and magnesium ions in water is called hardness and it is an important characteristic of drinking water. The method of chemical analysis was used to study the total hardness of tap water, which was additionally purified using a household filter with a standard cassette and with a cassette with additional mineralization of water. Adsorption processes in a standard cassette resulted in an undesirable decrease in hardness to very soft water. Water hardness increased with cleaning with a mineralizing cassette. Moreover, the level of hardness corresponded to the degree of mineralization declared by the manufacturer.