Question

which is more soluble in blood carbon dioxide or oxygen and why?

Answer 1

Carbon dioxide is more soluble in blood than is oxygen; about 5 to 7 percent of all carbon dioxide is dissolved in the plasma. Carbon dioxide has the ability to attach to hemoglobin molecules; it will be removed from the body once they become dissociated from one another.

Answer 2

The diffusibility, D, is determined by a molecule's solubility divided by the root of its molecular weight. While oxygen and carbon dioxide have similar molecular weights, carbon dioxide is 20 times moresoluble than oxygen and therefore has a much higher D.