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equlibrium concentration

Discussion in 'DAT Discussions' started by theedaddy77, Jun 3, 2008.

  1. theedaddy77

    theedaddy77 2+ Year Member

    May 9, 2008
    What is the equilibrium constant, K, at 400K if 3.00 moles of CO2(g) introduced into a 2 liter container are 20.0% dissociated at equilibrium?
    2 CO2(g) <==> 2CO(g) + O2(g)

    A. (0.30)2(0.15) / (1.20)2 mol/liter
    B. (1.20)2 / (0.30)2(0.15) mol/liter

    i know it is either or A or B but how do i know what is the product and was the reactant, when it is a equalibrium and can go both ways?

    (the answer is A)
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  3. Orgodox

    Orgodox 7+ Year Member

    Feb 8, 2008
    New York
    Dont over-think it even though its equilibrium generally refer to products on the left side and reactants on the right

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