Carbonic acid is a weak acid formed when carbon dioxide (CO2) dissolves in water. It plays a crucial role in maintaining the pH balance in natural waters and is involved in various biological processes. Carbonic acid can dissociate into bicarbonate (HCO3-) and hydrogen ions (H+), which are important for regulating acidity in the environment. In addition to its natural occurrence, carbonic acid is also used in the beverage industry to create carbonated drinks. When carbon dioxide is added to water under pressure, it forms carbonic acid, giving fizzy drinks their characteristic bubbles and slightly tangy taste.