Question

What's the PH of the stomach and small intestine

Answer 1

The pH of the stomach is acidic while that of small intestine is slightly alkaline.

What is pH?

This is referred to as the power of hydrogen and is the measure of the degree of acidity or alkalinity of a substance.

The stomach contains dil. Hcl which makes it acidic while the small intestine is alkaline because of the presence of bile.

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Answer 2

The intraluminal pH is rapidly changed from highly acid in the stomach to about pH 6 in the duodenum. The pH gradually increases in the small intestine from pH 6 to about pH 7.4 in the terminal ileum. The pH drops to 5.7 in the caecum, but again gradually increases, reaching pH 6.7 in the rectum.