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Thread: CO2 Calculator Question

  1. #1 CO2 Calculator Question 
    New Member
    Join Date
    Jul 2010
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    I raise frogs in aquariums and am part of an online community of folks who also raise frogs. As I plant my tanks with store bought plants I find that the plants often have unwanted visitors and inhabitants. I now have tanks that have slugs and milipeds and they love munching on the plants. We have used the dry ice method to generate CO2 to kill the pests, but the cold is very hard on the plants; expensive orchids don't survive well but they don't do well with the constant munching either.

    I am building a CO2 generator which will use vinegar and baking soda to kill the pests, but I would like to be able to put in the correct amounts of vinegar and baking soda to generate only enough CO2 for each tank size, rather then just dumping a bunch of baking soda into vinegar.

    I have spent several hours google searching for a CO2 calculator that will tell me of the me how much vinegar and baking soda to make x number of gallons CO2. Is there such an animal?

    Or is there an online table that shows how much of each chemical to generate so much CO2, either in Gallons or Liters.

    It has been 30 years since I took any chemistry classes and I don't remember how to calculate Moles into volumes etc.

    Or could one of you kindly be able to post the amounts of vinegar / baking soda to generate one gallon of CO2 and I can extrapolate the rest from there.


    Thanks so much,

    Dave


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  3. #2  
    Forum Ph.D.
    Join Date
    Jan 2009
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    951
    reaction is
    NaHCO3 (aq) + CH3COOH (aq) ----> CO2 (g) + H2O (l) + CH3COONa (aq)
    thus 84gmw 60gmw 22.4L gas(i mole)
    APROX CALC IS
    vinegar is only 5% acetic acid so 200ml of vinegar has about 10gm acid or 16.6% of a mole of acetic acid. 16.6% of a mole of soda is 13.9 gm thus you would get 16.6 % of a mole of gas or 3.7L gas ,OR .97GL
    for all you purists I approximated.


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  4. #3  
    New Member
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    Thank You so much.

    Dave
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