JEE Main Chemistry question

The of acetylsalicylic acid (aspirin) is 3.5. The pH of gastric juice in the human stomach is about 2–3 and the pH in the small intestine is about 8. Aspirin will be:

(A)Unionised in the small intestine and in the stomach
(B)Completely ionised in the small intestine and in the stomach
(C)Ionised in the stomach and almost unionised in the small intestine
(D)Ionised in the small intestine and almost unionised in the stomachCorrect

Answer: (D)

Solution

In the stomach (pH≈2–3, close to/below ), aspirin remains largely unionised.

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Question ID VK-135956