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  2. Henderson–Hasselbalch equation - Wikipedia

    en.wikipedia.org/wiki/Henderson–Hasselbalch...

    The Henderson–Hasselbalch equation can be used to model these equilibria. It is important to maintain this pH of 7.4 to ensure enzymes are able to work optimally. [10] Life threatening Acidosis (a low blood pH resulting in nausea, headaches, and even coma, and convulsions) is due to a lack of functioning of enzymes at a low pH. [10]

  3. Artificial seawater - Wikipedia

    en.wikipedia.org/wiki/Artificial_Seawater

    The tables below present an example of an artificial seawater (35.00‰ of salinity) preparation devised by Kester, Duedall, Connors and Pytkowicz (1967). [1] The recipe consists of two lists of mineral salts, the first of anhydrous salts that can be weighed out, the second of hydrous salts that should be added to the artificial seawater as a solution.

  4. pH - Wikipedia

    en.wikipedia.org/wiki/PH

    There is evidence of ongoing ocean acidification (meaning a drop in pH value): Between 1950 and 2020, the average pH of the ocean surface fell from approximately 8.15 to 8.05. [29] Carbon dioxide emissions from human activities are the primary cause of ocean acidification, with atmospheric carbon dioxide (CO 2 ) levels exceeding 410 ppm (in 2020).

  5. Ocean acidification - Wikipedia

    en.wikipedia.org/wiki/Ocean_acidification

    Between 1950 and 2020, the average pH value of the ocean surface is estimated to have decreased from approximately 8.15 to 8.05. [2] This represents an increase of around 26% in hydrogen ion concentration in the world's oceans (the pH scale is logarithmic, so a change of one in pH unit is equivalent to a tenfold change in hydrogen ion ...

  6. Aquarium filter - Wikipedia

    en.wikipedia.org/wiki/Aquarium_filter

    Aquarium filters are critical components of both freshwater and marine aquaria. [1] [2] [3] Aquarium filters remove physical and soluble chemical waste products from aquaria, simplifying maintenance. Furthermore, aquarium filters are necessary to support life as aquaria are relatively small, closed volumes of water compared to the natural ...

  7. Universal indicator - Wikipedia

    en.wikipedia.org/wiki/Universal_indicator

    Low pH colour Transition pH range High pH colour Thymol blue (first transition) Red 1.22.8 Yellow Methyl orange: Red 3.24.4 Yellow Methyl red: Red 4.86.0 Yellow Bromothymol blue: Yellow 6.0 – 7.6 Blue Thymol blue (second transition) Yellow 8.0 – 9.6 Blue Phenolphthalein: Colourless 8.3 – 10.0 Fuchsia

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