Acid

Summary: They all taste sour. This is because they contain acids. Vomit includes an acid from the stomach that helps digest foods. Vinegar contains ethanoic acid. Lemons contain citric acid. Tags: science student-book-7 chemistry Created: 2026-05-21 Last Updated: 2026-05-21

Acid

They all taste sour. This is because they contain acids. Vomit includes an acid from the stomach that helps digest foods. Vinegar contains ethanoic acid. Lemons contain citric acid.

Source

This concept is from the [Science Student Book 7](Science Student Book 7/Chemistry/Acids and Alkalis/4.1 Acids and alkalis.md), Chemistry section.