For the aqueous equilibrium reaction a large volume of water is suddenly added while…
CHEMISTRY · Single correct · A Level · Chemistry · Chemical equilibria (Le Chatelier’s principle and Kc) · Chemical equilibria (Le Chatelier’s principle and Kc)
Problem
For the aqueous equilibrium reaction
N2O4(aq)⇌2NO2(aq)
a large volume of water is suddenly added while temperature is held constant. Which statement best predicts the immediate response of the system?
(a) The equilibrium shifts toward formation of N2O4 because dilution favors the side with fewer dissolved particles.
(b) The position of equilibrium is unchanged because all concentrations are reduced proportionally, leaving the reaction quotient equal to K.},{
(c) The equilibrium shifts toward formation of NO2 because producing more dissolved particles offsets the dilution.
(d) The equilibrium constant decreases when water is added, so the reaction shifts toward reactants until Q=K again.