Answer :
The addition of carbon dioxide to the blood makes it acidic and this will generate hydrogen ions in the red blood cells.
Acidification of blood
The addition of carbon dioxide to the blood makes it become acidic.
The presence of carbon dioxide in the blood activates the carbonic anhydrase enzyme which catalyzes the formation of carbonic acid from carbon dioxide and water.
When this happens, the hydrogen ion stimulates red blood cells to unload more oxygen at the tissues.
More on blood acidification can be found here; https://brainly.com/question/7269362