H2CO3 is the molecular formula for which acid ?
Gluconic acid Gluconic acid Gluconic acid is an organic compound with molecular formula CHO and condensed structural formula HOCH(CHOH)COOH. It is one of the 16 stereoisomers of 2,3,4,5,6-pentahydroxyhexanoic acid. In aqueous solution at neutral pH, gluconic acid forms the gluconate ion. The salts of gluconic acid are known as "gluconates". Gluconic acid, gluconate salts, and gluconate esters occur widely in nature because such species arise from the oxidation of glucose. Some drugs are injected in the form of gluconates. The chemical structure of gluconic acid consists of a six-carbon chain, with five hydroxyl groups positioned in the same way as in the
Tannic acid sulfuric acid in red flocks. (Stenhouse, Ann. Ch. Pharm. xlv. 16.) <br>According to Rochleder (ibid lxiii. 202), the tannic acid of black tea is the same as that of oak-bark. In 1880, Etti gave for it the molecular formula CHO. He described it as an unstable substance, having a tendency to give off water to form anhydrides (called phlobaphenes), one of which is called "oak-red" (CHO). For him, it was not a glycoside. In Allen’s "Commercial Organic Analysis", published in 1912, the formula given was CHO. Other authors gave other molecular formulas like CHO, while another formula found is CHO.