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Mass Action Expression definition

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For a reversible reaction, aA + bB cC + dD the product of the concentrations of the products (species on the right), each raised to the power that corresponds to its coefficient in the balanced chemical equation, divided by the product of the concentrations of reactants (species on the left), each raised to the power that corresponds to its coefficient in the balanced chemical equation . At equilibrium the mass action expression is equal to K; at other times it is Q.[C]c[D]d [A]a[B]b = Q, or at equilibrium K

See also:

mero: definition
Mass Deficiency definition
meso-Compound definition
material control system (MCS) definition
mean cycles between assists (MCBA) definition