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Chemistry  /  Chem 1749  ·  Atom · ~20 seconds

Equilibrium Constant Expression Construction

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An equilibrium constant expression is products' equilibrium concentrations, each raised to its coefficient, divided by reactants' equilibrium concentrations, each raised to its coefficient.

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For N2 + 3 H2 ⇌ 2 NH3, K = [NH3]²/([N2][H2]³), coefficients becoming exponents.

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Building the expression from the equation's coefficients before it is balanced gives a wrong expression entirely.

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