In inorganic chemistry, bicarbonate (IUPAC-recommended nomenclature: hydrogencarbonate)'s an intermediate form in the deprotonation of carbonic acid. Its chemical formula's HCO3−. Bicarbonate serves a crucial biochemical role in the physiological pH buffering system. Chemical properties The bicarbonate ion (hydrogencarbonate ion)'s an anion with the empirical formula HCO3− and a molecular mass of 61.01 daltons; it consists of one central carbon atom surrounded by three oxygen atoms… (More on Bicarbonate)