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Co2 Concentration Equation

Discussion in 'CO2 Enrichment' started by osmar, Jan 4, 2018.

  1. osmar

    osmar New Member

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    I read somewhere here that co2 can be estimated: co2 = 3x10 ^ x; x = displacement

    that's true? where this equation came from
     
  2. Phishless

    Phishless Lifetime Member
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    It solves for all positions in the CO2 charts that are out there.
    I don't know where or whom came up with this?

    [​IMG]
     
    Greggz likes this.
  3. Allwissend

    Allwissend Article Editor
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    At the basic level it comes from here :
    CO2 (aq) + H2O <--> H2CO3 (aq)
    H2CO3 (aq) <-->H+ (aq) + HCO3- (aq)

    HCO3- (aq) <-->H+ (aq) + CO3 2- (aq)
    that H+ influences the pH, per the definition of pH
    pH=-log10[H+]

    Then you have a lot of math and constants, add to that a lot of approximations for temperature, relative pressure etc.and you get your formula.

    I would start reading here :
    http://www.thekrib.com/Plants/CO2/

    And if you feel sciency , this explains a little bit better why the theory behind it works
    http://www-naweb.iaea.org/napc/ih/documents/global_cycle/vol%20I/cht_i_09.pdf
    also
    http://ion.chem.usu.edu/~sbialkow/Classes/3650/Carbonate/Carbonic%20Acid.html

    And after all that theoretical work you come back to the aquarium where so many things in the water affect the pH and KH is not only carbonates and you discover it does not apply 100% to real life. Can serve as a basic guideline but better to watch your fish and plants
     
    Greggz likes this.
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