Glutamic acid 170 forms the final main-chain hydrogen bond in the molecule.

An acid may also form hydrogen bonds to its conjugate base.

The acid in wine formed during the process of malolactic fermentation.

The tartaric acid in the wine acted upon the metal cup and formed tartarised antimony.

Alkaloids and acids form salts of various strengths.

The acid commonly forms a resinous mass, but can be crystallized in long, white needles.

The nitric acid normally forms a foam of small bubbles.

Then the viral acids form a circle in the center of the cell.

A special case of the acid-base reaction is the neutralization where an acid and a base, taken at exactly same amounts, form a neutral salt.

Should the reserve alkalinity decline to zero, those acids form and corrode the engine.