Define and give an example of an acid and of a base.

A Brønsted-Lowry acid is defined as a compound that gives hydronium ions to another compound-for example, hydrochloric acid gives H + ions to compounds it reacts with. Brønsted-Lowry bases are compounds that can accept hydronium ions-when ammonia gets a hydronium ion from HCl, it forms the ammonium ion.