Reaction Quotient in Chemistry

What Is a Reaction Quotient?

Scientist pouring liquid between beakers
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Reaction quotient is the ratio of the concentrations of the products of a reaction to the concentrations of the reactants.

Each concentration is raised to the power of the stoichiometric coefficient in the chemical formula.

Finding the Reaction Quotient

In general, for the reaction:

aA + bB → cC + dD

The reaction quotient, Q is:

Q = [C]c[D]d/[A]a[B]b