[baggravation]

un-ionized aspirn molecules can readily penetrate the stomach lining into a region of less adicity. This is where the stomach irritation associated with aspirn occurs. Use Le Chatelier's principle to explain why irritation occurs in this area.

Could someone explain the relevance this question has to Le Chatelier's principle? I'm not understanding the relationship between the two.

[plankk]

How does unionized aspirin look like and how does ionized aspirin look like? Write the equilibrium equation between these two molecules. How does acidity influence on that equilibrium?