- magnesium hardness
- магниевая жёсткость
English-Russian scientific dictionary. 2008.
magnesium hardness
Смотреть что такое "magnesium hardness" в других словарях:
Magnesium — Not to be confused with Manganese. sodium ← magnesium → aluminium Be ↑ Mg ↓ Ca … Wikipedia
magnesium — /mag nee zee euhm, zheuhm, shee euhm/, n. Chem. a light, ductile, silver white, metallic element that burns with a dazzling white light, used in lightweight alloys, flares, fireworks, in the manufacture of flashbulbs, optical mirrors, and… … Universalium
hardness — 1. The degree of firmness of a solid, as determined by its resistance to deformation, scratching, or abrasion. SEE ALSO: h. scale, number. 2. The relative penetrating power of a beam of x rays, used both within the diagnostic range of … Medical dictionary
hardness — noun 1. the property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scale • Ant: ↑softness • Derivationally related forms: ↑hard • Hypernyms: ↑consistency, ↑consistence, ↑eubstance, ↑ … Useful english dictionary
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
hardness — 1. Property of water that prevents lathering because of the presence of cations, mainly calcium and magnesium, which form insoluble soaps [10]. 2. The sum of calcium and magnesium ions expressed as the equivalent amount of calcium carbonate … Lexicon of Cave and Karst Terminology
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
Mohs scale of mineral hardness — The Mohs scale of mineral hardness characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer material. It was created in 1812 by the German geologist and mineralogist Friedrich Mohs 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
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
