The reaction quotient, Q
At any time, t, the system can be sampled to determine the amounts of reactants and products present. A ratio of products to reactants, calculated in the same manner as K, tells us whether the system has reached equilibrium (Q = K) or whether the reactio
Molar concentrations of the substances in the reaction are used. This is symbolized using square brackets - [ ].
For a general reaction aA + bB cC + dD where a, b, c and d are the numerical coefficients in the balanced equation, Q (and K) can be calculated as:
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