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Homework Help: Regarding Equilibrium Constant

  1. Aug 28, 2007 #1
    1. The problem statement, all variables and given/known data
    Not really a textbook question, but I've read from numerous sources that changing the concentration of the reactants/products won't change the equilibrium constant. Why isn't this contradictory?

    Assume the reaction:
    xX + yY <---> zZ
    where x,y,z are the coefficients of X,Y,Z

    Keq = [Z]^z/[X]^x[Y]^y

    So if I change the concentration of say, X, then won't Keq change by definition?
  2. jcsd
  3. Aug 28, 2007 #2


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    No. The constant will remain constant. The concentration of Z and/or Y will change accordingly to maintain the equality.
  4. Aug 28, 2007 #3
    Thanks a lot. That cleared it up for me.
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