what is an Acid in chemistry
An acid (from the Latin acidus/acÄre meaning sour) is a chemical substance whose aqueous solutions are characterized by a sour taste, the ability to turn blue litmus red, and the ability to react with bases and certain metals (like calcium) to form salts.Aqueous solutions of acids have a pH of less than 7.n water each of these essentially ionizes 100%. The stronger an acid is, the more easily it loses a proton, H + . Two key factors that contribute to the ease of deprotonation are the polarity of the HâA bond and the size of atom A, which determines the strength of the HâA bond.