1.What are the acids in life

Vinegar.

Compounds in which all the cations produced during ionization are hydrogen ions (H+) are called acids, or substances that dissolve in water and release protons to form H3O+ (hydrated hydrogen ions) are also acids.The higher the concentration of H3O+, the more acidic the solution. H3O+ is present even in pure water at a concentration of 10-7 mol/L.

This is caused by protons running from one water molecule to another. In the traditional sense, the concentration of H3O+ also depends on the concentration of hydrogen ions, although most of the hydrogen ions in aqueous solution are in the form of H3O+.

Acid is a collective term for a class of compounds .

Acids are narrowly defined in chemistry as compounds in which all the cations ionized in aqueous solution are hydrogen ions. Proposed by Arrhenius, this theory is known as the Arrhenius acid-base theory.

The broader definition is: a substance that is capable of accepting electron pairs.

Most of these substances are soluble in water, and a few, e.g., silicic acid, are insoluble in water. Aqueous solutions of acids generally conduct electricity, and their conductive properties are related to their degree of ionization in water. Part of the acid in water in the form of molecules, non-conductive; part of the acid in water dissociation for positive and negative ions, can be conductive.