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  2. Dealkalization of water - Wikipedia

    en.wikipedia.org/wiki/Dealkalization_of_water

    In order to justify installation of a dealkalizer on low-pressure boilers, the alkalinity content should be above 50 ppm with the amount of make-up water exceeding 1,000 gallons (approx. 4,000 litres) per day. Cooling system make-up will also benefit from reduced alkalinity.

  3. Orange River white-eye - Wikipedia

    en.wikipedia.org/wiki/Orange_River_white-eye

    The Orange River white-eye ( Zosterops pallidus) is a species of bird in the family Zosteropidae, which is native to Namibia and South Africa. It was formerly deemed conspecific with the Cape white-eye ( Zosterops virens ), but the two species occur sympatrically in central South Africa, and they are genetically distinct.

  4. Metacresol purple - Wikipedia

    en.wikipedia.org/wiki/Metacresol_purple

    Metacresol purple or m-cresol purple, also called m-cresolsulfonphthalein, is a triarylmethane dye and a pH indicator. It is used as a capnographic indicator for detecting detect end-tidal carbon dioxide to ensure successful tracheal intubation in an emergency. [1] [2] It can be used to measure the pH in subzero temperatures of saline or ...

  5. New York (state) - Wikipedia

    en.wikipedia.org/wiki/New_York_(state)

    New York, sometimes called New York State, [b] is a state in the Northeastern United States. One of the Mid-Atlantic states, it borders the Atlantic Ocean, New England, Canada and the Great Lakes. [c] With almost 19.6 million residents, it is the fourth-most populous state in the United States and eighth-most densely populated as of 2023. [5]

  6. Azo violet - Wikipedia

    en.wikipedia.org/wiki/Azo_violet

    Azo violet ( Magneson I; [1] p-nitrobenzeneazoresorcinol) is an azo compound with the chemical formula C 12 H 9 N 3 O 4. It is used commercially as a violet dye and experimentally as a pH indicator, appearing yellow below pH 11, and violet above pH 13. [2]

  7. Bromothymol blue - Wikipedia

    en.wikipedia.org/wiki/Bromothymol_blue

    Bromothymol blue (also known as bromothymol sulfone phthalein and BTB) is a pH indicator. It is mostly used in applications that require measuring substances that would have a relatively neutral pH (near 7). A common use is for measuring the presence of carbonic acid in a liquid. It is typically sold in solid form as the sodium salt of the acid ...