acid base equilibria ppq's corrections

Question 1

This is a question about buffer solutions.
One of the systems controlling the pH of blood is the carbonic acid-hydrogencarbonate buffer system.
Explain how this buffer system helps to control the pH of blood when extra carbon dioxide is present due to strenuous exercise.

Answer 1

• Carbon dioxide is dissolved in the blood to form carbonic acid so the concentration increases
• position of equilibrium shifts to the right to produce more H+ ions
  -The higher concentration of hydrogen carbonate ions will suppress the ionisation of carbonic acid to help control the pH.