The position of the equilibrium CaCO3(s) ⇌ CaO(s) + CO2(g) does not depend on the amounts of CaCO3(s) and CaO(s) present.If pure solids or pure liquids are involved in a chemical reaction, their concentrations are not included in the equilibrium expression for the reaction.This simplification occurs only with pure solids or liquids, not with solutions or gases, since in these last two cases the concentrations can vary.if the reaction were carried out under conditions where the water is a gas rather than a liquid, that is,because the concentration or pressure of water vapor can changeWrite the expressions for K and Kp for the following processes:a. Solid PCl5 decomposes to liquid PCl3 and Cl2 gas. b. Deep blue solid copper(II) sulfate pentahydrate is heated to drive off water vapor to form white solid copper(II) sulfate.Hydrated copper(II) sulfate on the left. Water applied to anhydrous copper(II) sulfate, on the right, forms the hydrated compound.a. The reaction isThe equilibrium expressions areIn this case neither the pure solid PCl5 nor the pure liquid PCl3 is included in the equilibrium expressions.b. The reaction isThe equilibrium expressions areThe solids are not included.