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Explain how you might deduce the equilibrium constant for a reaction in which you know the...

Explain how you might deduce the equilibrium constant for a reaction in which you know the initial concentrations of the reactants and products and the equilibrium concentration of only one reactant or product?

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Answer #1

If we know the concentration of reactants and products at the start of the experiment, and the concentration of at least one product or reactant at equilibrium, and we know the stoichiometry of the balanced chemical equation, we can determine the values of the other reactants and products

The steps in this method are as follows:

  1. List the known initial and equilibrium concentrations of all reactants and products involved in the equilibrium
  2. For those reactants or products, for which both the initial and equilibrium concentrations are known, calculate the change in concentration that occurs as the system reaches equilibrium
  3. Use the stoichiometry of the reaction to calculate the predicted changes in concentration for all the other reactants and products in the equilibrium
  4. From the initial concentrations, and the changes in concentration, calculate the equilibrium concentrations (and Kc)
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