When a chemical reaction is at equilibrium, which of the following statements is always TRUE?
a) the equilibrium constant (keq) equals 1
b) the ratio of the concentrations of reactants and products equals 1
c) the rate of the forward reaction is equal to the rate of the backward reaction
d) all of the choices are correct
Ans: c) the rate of the forward reaction is equal to the rate of the backward reaction
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