Chemistry Equilibrium Help?

Question

http://www.bi10etc.com/esterification.pdf

A common misconception among beginning students is that "you leave liquids and solids out of equilibrium constants.: All the species involved in this reaction were liquids, and all of their concentrations were included in the calculatioon of the equilibrium constant. Explain.

Answer 1

Step 1:

In heterogeneous reaction, is a where the products and reactants can be one or more form of states.

The rate of reaction of solid and liquid are not considered.

For example:

Equilibrium constant of this equation is .

The concentration of the solid or liquid reactants are considered as 1 or neglected because the change in solid or liquid concentration is almost negligible.

In other words the activity value of solid and liquid are equal to 1.

Hence we do not consider the concentration of solid and liquid.

Step 2:

In esterification process, the concentrations of the reactants gradually decrease while the concentrations of products increase until all become constant (but not zero).

According to Le Chatelier's Principle, changes in conditions of temperature, pressure and concentration can move the equilibrium position.

Hence for the esterification process, the concentration of all reactants are included in equilibrium constants.

Solution:

For esterification process, the concentration of all reactants are included in equilibrium constants.