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the hardness of the water

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  • 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 — This article is about general aspects of water. For a detailed discussion of its properties, see Properties of water. For other uses, see Water (disambiguation) …   Wikipedia

  • Water softening — A water softener reduces the dissolved calcium, magnesium, and to some degree manganese and ferrous iron ion concentration in hard water.These hardness ions cause three major kinds of undesired effects. Most visibly, metal ions react with soaps… …   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

  • water softener — noun a substance (such as sodium chloride) that lessens the hardness of water by replacing calcium and magnesium ions with sodium ions and so gives the water more efficient sudsing power • Hypernyms: ↑softener • Hyponyms: ↑zeolite * * * ˈwater… …   Useful english 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 hardness — the concentration of calcium and magnesium ions in water expressed as p.p.m. or mg/l of calcium carbonate equivalents. Water hardness expressed in degrees of hardness. 0 4 is very soft, 5 8 soft, up to 30 which is extremely hard water. Note that… …   Dictionary of ichthyology

  • hardness — water with a high mineral content, the name deriving from the fact that it is hard to develop a lather for cleaning. The concentration of calcium and magnesium ions in water is expressed as p.p.m. or mg/l of calcium carbonate equivalents. Soft… …   Dictionary of ichthyology

  • The Canon of Medicine — (Arabic: القانون في الطب Al Qanun fi al Tibb The Law of Medicine ; Persian: قانون Qanun Law ; Latin: Canon Medicinae Canon of Medicine ; Chinese: Hui Hui Yao Fang Prescriptions of the Hui Nationality ) is a 14 volume Arabic medical encyclopedia… …   Wikipedia

  • The Sacrament of Penance —     The Sacrament of Penance     † Catholic Encyclopedia ► The Sacrament of Penance     Penance is a sacrament of the New Law instituted by Christ in which forgiveness of sins committed after baptism is granted through the priest s absolution to… …   Catholic encyclopedia

  • 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

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