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Homework Help: I need help with chemical equilibrium problems

  1. Mar 24, 2010 #1
    1. okay so the equation is:
    3A+2B---->C+D
    K=1.00x10(to the negative third power)
    A=9.5-M C=0.0200-M D=0.0200 what is B ?



    3. the answer is either 1.24: 0.0216: : 0.00180 : or 0.110
    (i don't remember) so what i don't get is HOW DO I SET UP THE PROBLEM? :confused:

    go step by step if you can and if you know some sites that would help post those too o_O
     
  2. jcsd
  3. Mar 25, 2010 #2

    danago

    User Avatar
    Gold Member

    If you have some chemical reaction:

    aA + bB ----> cC + dD

    At equilibrium, the concentration of A, B, C and D are related to the equilibrium constant, K:

    [tex]
    K = \frac{[C]^c [D]^b}{[A]^a ^b}
    [/tex]

    Where a, b, c and d are the stoichiometric coefficients.

    How can you apply this to the given problem?
     
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