It is an example of Cyclical unemployment. hope i helped!
Bicarbonate buffer system. Human blood contains large amounts of carbonic acid, which is a weak acid, and bicarbonates, a strong base. If blood pH falls below 6.8 or rises above 7.8, one can become sick or die. This bicarbonate buffer system help maintain blood pH at 7.4. The bicarbonate neutralizes excess acids in the blood while the carbonic acid neutralizes excess bases.
You could be depressed from a lot of different things, from losing your job to someone passing away
A volatile acid can leave the solution and enter the atmosphere
