CHEMISTRY · Single correct · A Level · Chemistry · Acids and bases · Acids and bases
Problem
The pKa of acetyl salicylic acid (aspirin) is 3.5. The pH of gastric juice in human stomach is about 2 – 3 and the pH in the small intestine is about 8. Aspirin will be :
(1) unionised in small intestine and in the stomach
(2) completely ionised in the small intestine and in the stomach
(3) ionised in the stomach and almost unionised in the small intestine
(4) ionised in the small intestine and almost unionised in the stomach