alleryStart learning →Roughly what concentration of hydrochloric acid does the stomach hold to help digestion?
AAbout 0.03 M
BAbout 0.30 M
CAbout 3.0 M
DAbout 0.003 M
Answer & Solution
Correct answer: A. About 0.03 M
1. The stomach lining secretes hydrochloric acid to help break down food.
2. The working concentration is roughly 0.03 mol per litre.
3. Heartburn happens when some of this acid leaks up into the unprotected oesophagus.
4. An antacid is a base taken to neutralise that excess acid.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 14 "Acid-Base Equilibria", section 14.4 Hydrolysis of Salt Solutions_
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