- permanent hardness of water
- постоянная жесткость воды
English-Russian dictionary of chemistre. 2014.
permanent hardness of water
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permanent hardness — hardness of water not removed by boiling; it is usually due to sulfates and chlorides … Medical dictionary
permanent hardness — noun : the part of the total hardness of water that persists after boiling distinguished from temporary hardness … Useful english dictionary
permanent hardness — /pɜmənənt ˈhadnəs/ (say permuhnuhnt hahdnuhs) noun hardness of water which is not destroyed by boiling …
permanent hardness — noun the presence in water of mineral salts (chiefly calcium sulphate) that are not 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
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
Carbonate hardness — is the measure of Calcium and Magnesium and other hard ions associated with carbonate (CO32 ) and bicarbonate (HCO3 ) ions contained in a solution, usually water. It is usually expressed either as parts per million (ppm or mg/L), or in degrees… … Wikipedia
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
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
Magnetic water treatment — General Arrangement of MWT Apparatus Magnetic Water treatment[1] usually by the application of a changing Magnetic flux is a proposed method of water softening[2] … Wikipedia
Malvern water — This article is about natural Malvern spring water. For the bottled product, see Malvern Water (bottled water). St. Ann s Well, Great Malvern, a popular café for walkers on the hills. The building on the right houses the spout from which the… … Wikipedia
