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  2. Calcium Lime Rust - Wikipedia

    en.wikipedia.org/wiki/Calcium_Lime_Rust

    Calcium deposits, primarily composed of calcium carbonate (CaCO 3), react with weak acids to form calcium salts that are soluble in water. The general reaction can be represented as follows: CaCO 3 + 2H + → Ca + 2 + CO 2 + H 2 O. Here, H + represents the hydrogen ions provided by the acid

  3. Calcium hypochlorite - Wikipedia

    en.wikipedia.org/wiki/Calcium_hypochlorite

    Calcium hypochlorite is an inorganic compound with chemical formula Ca(Cl O) 2, also written as Ca(OCl) 2.It is a white solid, although commercial samples appear yellow. It strongly smells of chlorine, owing to its slow decomposition in moist air.

  4. Lime softening - Wikipedia

    en.wikipedia.org/wiki/Lime_softening

    Lime softening (also known as lime buttering, lime-soda treatment, or Clark's process) [1] is a type of water treatment used for water softening, which uses the addition of limewater (calcium hydroxide) to remove hardness (deposits of calcium and magnesium salts) by precipitation.

  5. HAZMAT Class 4 Flammable solids - Wikipedia

    en.wikipedia.org/wiki/HAZMAT_Class_4_Flammable...

    Division 4.1: Flammable Solid . Flammable solids are any of the following four types of materials: Desensitized Explosives: explosives that, when dry, are Explosives of Class 1 other than those of compatibility group A, which are wetted with sufficient water, alcohol, or plasticizer to suppress explosive properties; and are specifically authorized by name either in the 49CFR 172.101 Table or ...

  6. Hypochlorite - Wikipedia

    en.wikipedia.org/wiki/Hypochlorite

    Hypochlorites, especially of sodium ("liquid bleach", "Javel water") and calcium ("bleaching powder") are widely used, industrially and domestically, to whiten clothes, lighten hair color and remove stains. They were the first commercial bleaching products, developed soon after that property was discovered in 1785 by French chemist Claude ...

  7. Laundry wastewater - Wikipedia

    en.wikipedia.org/wiki/Laundry_wastewater

    Builders in detergents are water softeners, which can remove calcium and magnesium ions by complexation or precipitation in hard water which contains high levels of calcium and magnesium. Sodium triphosphate, with a formula of Na 5 P 3 O 10, is a largely used builder in laundry detergents, which can lead to eutrophication caused by phosphorus ...

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  9. Swimming pool sanitation - Wikipedia

    en.wikipedia.org/wiki/Swimming_pool_sanitation

    An electrically operated water pump is the prime motivator in recirculating the water from the pool. Water is forced through a filter and then returned to the pool. Using a water pump by itself is often not sufficient to completely sanitize a pool. Commercial and public pool pumps usually run 24 hours a day for the entire operating season of ...