What is H2CO3 more commonly known as?

H2CO3 is more commonly known as Carbonic Acid. This compound forms when carbon dioxide (CO2) dissolves in water. Its presence is important in various natural processes, including the regulation of pH in blood and the formation of carbonated beverages. Carbonic acid plays a critical role in the buffering system of blood, helping to maintain the appropriate acid-base balance necessary for physiological functions.

The other options, while they are all acids, refer to different chemical compounds: Hydrochloric Acid is HCl, Citric Acid is C6H8O7 and is found in citrus fruits, and Acetic Acid is CH3COOH, the main component of vinegar. Understanding these distinctions helps in recognizing the properties and applications of each specific acid.