water hardness
21hardness — 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 …
22hardness — hard•ness [[t]ˈhɑrd nɪs[/t]] n. 1) the state or quality of being hard 2) chem. that quality in water that is imparted by the presence of dissolved salts, esp. calcium sulfate or bicarbonate 3) mir the comparative ability of a substance to scratch …
23hardness — /ˈhadnəs/ (say hahdnuhs) noun 1. the state or quality of being hard. 2. an instance of this quality. 3. that quality in impure water which is imparted by the presence of dissolved salts, especially calcium sulphate. 4. Mineralogy the comparative… …
24Hard 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… …
25Purified water — Bottle for Distilled water in the Real Farmacia in Madrid Purified water is water from any source that is physically processed to remove impurities. Distilled water and deionized (DI) water have been the most common forms of purified water, but… …
26Lansing Board of Water & Light — The Lansing Board of Water and Light is a municipal utility that provides electricity and water to the residents of the Cities of Lansing and East Lansing, Michigan and the surrounding townships of Delta, Delhi, Meridian and DeWitt. The Lansing… …
27Gold Coast Water — is responsible for the provision of potable and recycled water products and wastewater services throughout the Gold Coast, Queensland with a vision to create a sustainable waterfuture for the City. Gold Coast Water was established as a… …
28carbonate 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;… …
29permanent hardness — hardness of water not removed by boiling; it is usually due to sulfates and chlorides …
30temporary hardness — hardness of water removed by boiling; it is due to soluble bicarbonates, which lose CO2 on boiling and precipitate as normal carbonates …
