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temporary hardness of water

См. также в других словарях:

  • temporary hardness — hardness of water removed by boiling; it is due to soluble bicarbonates, which lose CO2 on boiling and precipitate as normal carbonates …   Medical dictionary

  • temporary hardness — noun : the portion of the total hardness of water that is removable by boiling whereby the soluble bicarbonates of calcium and magnesium are converted into the corresponding insoluble carbonates and are precipitated distinguished from permanent… …   Useful english dictionary

  • temporary hardness — noun the presence in water of mineral salts (chiefly calcium bicarbonate) that are removed by boiling …   English new terms dictionary

  • Hardness — Hard ness, n. [AS. heardness.] 1. The quality or state of being hard, literally or figuratively. [1913 Webster] The habit of authority also had given his manners some peremptory hardness. Sir W. Scott. [1913 Webster] 2. (Min.) The cohesion of the …   The Collaborative International Dictionary of English

  • Water supply and sanitation in the European Union — still is under the responsibility of each member state. Nevertheless, the European Union established some policies which impact the National water strategies tremendously. However, WSS evolved in every Member State independently until the… …   Wikipedia

  • Water purification — This article is about large scale, municipal water purification. For portable/emergency water purification, see portable water purification. For industrial water purification, see deionized water. For distilled water, see distilled water. Water… …   Wikipedia

  • carbonate hardness —    Hardness of water due to presence of dissolved bicarbonates of calcium and magnesium which can be removed by boiling and hence the term ‘temporary hardness.’    Synonyms: (French.) dureté temporaire; (German.) temporäre Härte, Carbonathärte;… …   Lexicon of Cave and Karst Terminology

  • Hard water — is the type of water that has high mineral content (in contrast with soft water ). Hard water minerals primarily consist of calcium (Ca2+), and magnesium (Mg2+) metal cations, and sometimes other dissolved compounds such as bicarbonates and… …   Wikipedia

  • permanent hardness — noun : the part of the total hardness of water that persists after boiling distinguished from temporary hardness …   Useful english dictionary

  • hard water — water that contains magnesium, calcium, or iron salts and therefore forms a soap lather with difficulty. * * * Water that contains mineral salts of calcium and magnesium, principally as bicarbonates, chlorides, and sulfates, and sometimes iron.… …   Universalium

  • Drinking water directive — The European Drinking Water Directive (DWD), Council Directive 98/83/EC concerns the quality of water intended for human consumption and forms part of the regulation of Water supply and sanitation in the European Union. The Directive is intended… …   Wikipedia

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