
pH of Seawater: The Role of Carbonate (CO3 and Bicarbonate .
and acids. The carbonate ion can react with calcium ions (Ca), which are in excess in seawater, to form calcium carbonate (CaCO3), the material out of which the shells of mussels, the skeleton of corals and the exoskeleton of some microalgae is made of. Aim: The following experiment aims to show how bicarbonate and carbonate regulates the pH of