Get premium membership and access revision papers with marking schemes, video lessons and live classes.

Processing. Please wait.

a) What condition is necessary for equilibrium to be established?
b) When calcium carbonate is heated, the equilibrium shown below is established
#CaCO_3(s) overset(rightarrow)(leftarrow) CaO(s) + CO_2#(g)
How would the position of equilibrium be affected if a small amount of dilute potassium hydroxide is added to the
equilibrium mixture? Explain.

Answer Text:
(a) When the rate of forward reaction is equal to the rate of backward reaction.
(b) The equilibrium shift to the right. Potassium hydroxide reacts with Carbon (IV) oxide reducing its concentration. Hence equilibrium shifts to the right to produce more carbon (IV) oxide