Effects of Concentration Change at Equilibrium

Very Easy General Chemistry Chemical Equilibrium

In a chemical equilibrium, the concentrations of reactants and products remain constant over time. Consider the reversible chemical reaction:

A(g) + B(g) <=> C(g) + D(g)

At equilibrium, if the concentration of A is increased, what will likely happen to the concentrations of B, C, and D?

The concentration of B will increase, and the concentrations of C and D will decrease.

The concentration of A will decrease, and the concentrations of B, C, and D will remain constant.

The concentrations of all substances will increase.

The concentration of B will decrease, while the concentrations of C and D will increase.

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