If an equilibrium is disturbed, it will shift in such a way as to counteract the disturbance and restore equilibrium. *increasing the concentration of a reactant with cause the equilibrium to shift to the right making more products. *decreasing the concentration of a reactant will cause the equilibrium to shift to the left making more reactants. *increasing the concentration of a product will cause the equilibrium to shift left making more reactants. *Decreasing the concentration of a product will cause the equilibrium to shift right making more products