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hard water |
Also found in: Medical, Acronyms, Wikipedia, Hutchinson | 0.04 sec. |
hard waterWater that contains mineral salts of calcium and magnesium, principally as bicarbonates, chlorides, and sulfates, and sometimes iron. Hardness caused by calcium bicarbonate is known as temporary, because boiling converts the bicarbonate to the insoluble carbonate; hardness from the other salts is called permanent. The calcium and magnesium in hard waters form a hard, adherent scale on boiler plates, increasing fuel consumption and leading to deterioration through overheating. Home water softeners consist of tanks containing zeolite minerals or ion-exchange resins, which contain sodium ions that change places with the calcium and magnesium. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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WaterPOINT 870 is the first fully integrated field handheld system that provides an entire panel of key water quality tests, including measurements for pH, ORP, conductivity, free chlorine, total chlorine, monochloramine, ammonia, total dissolved solids, carbonate alkalinity, calcium hardness, Langelier saturation index, calcium, carbon dioxide, and temperature. |
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