The ion in sea water that is serves as a buffer is:

Question

Quizplus · Accepted Answer

The ion that serves as a buffer in sea water is bicarbonate ion (HCO3-), which is present in the form of dissolved carbon dioxide (CO2) and carbonic acid (H2CO3). Option D represents bicarbonate ion in combination with hydrogen ion (H+) and carbonate ion (CO32-), and therefore serves as a buffer system. The other options do not represent bicarbonate ion and are not capable of acting as a buffer system in sea water.

The Ion in Sea Water That Is Serves as a Buffer