Translated version
Water hardness
A property of water determined by the concentration of dissolved calcium (Ca²⁺) and magnesium (Mg²⁺) ions in it, rather than the total mass of all salts.
Original version
Vandens kietumas
Vandens savybė, kurią lemia jame ištirpusių kalcio (Ca²⁺) ir magnio (Mg²⁺) jonų koncentracija, o ne bendra visų druskų masė.
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