Instead of protons, alkali citrate has the anions bound to non-proton, positively charged ions like sodium, potassium or magnesium, so that it does not donate protons. When part of a salt, the formula of the citrate anion is written as CĬitric acid is the citrate anions bonded by hydrogen ions (or protons) making it acidic. An example of the former, a salt is trisodium citrate an ester is triethyl citrate. Ī citrate is a derivative of citric acid that is, the salts, esters, and the polyatomic anion found in solution. It is used widely as an acidifier, as a flavoring, and a chelating agent. More than two million tons of citric acid are manufactured every year. In biochemistry, it is an intermediate in the citric acid cycle, which occurs in the metabolism of all aerobic organisms. Citric acid is an organic compound with the chemical formula HOC(CO 2H)(CH 2CO 2H) 2.
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