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The pK(a) of acety1 salicylic acid (aspi...

The `pK_(a)` of acety`1` salicylic acid (aspirin) is `3.5`. The `pH` of gastric juice in human stomach is about `2.3` and the `pH` in the same intestine is bout `8`. A spirin will be

A

unionised in the small intestine and in the stomach

B

completely ionized in the small intestine and in the stomach

C

ionized in the stomach and almost unionised in the small intestine

D

ionized in the small intestine and almost unionised in the stomach

Text Solution

Verified by Experts

The correct Answer is:
D
In stomach, pH is 2-3, i.e. strongly acidic and aspirin will be almost unionised here due to common ion effect. However,pH in small intestine is 8, basic, aspirin will be neutralized here.
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