Which ion is represented by HCO3-?

The ion represented by HCO3- is known as bicarbonate. Bicarbonate is an important ion in the body, playing a critical role in maintaining pH balance and acting as a buffer in biological systems. When carbon dioxide (CO2) dissolves in water, it can form carbonic acid (H2CO3), which can then dissociate into bicarbonate (HCO3-) and hydrogen ions (H+). This reaction is vital for respiratory function and regulation of blood pH.

The bicarbonate ion is frequently involved in physiological processes, including the regulation of acid-base balance in the body, and is a key component in the bicarbonate buffering system, which helps to maintain stable pH levels in blood and other bodily fluids.