Define:
a. buffer solution
b. acidosis (refer to A Clinical Perspective: Control of Blood \mathrm{pH} on page 255 )
a. A buffer solution contains components (a weak acid and its salt or a weak base and its salt) that enable the solution to resist large changes in \mathrm{pH} when acids or bases are added.
b. Acidosis is a medical condition characterized by higher than normal levels of \mathrm{CO}_{2} in the blood and lower than normal blood \mathrm{pH}.