1.An acid is best defined as:Â a. a substance with a pH between 0 and 7.
2.A base is best defined as:Â b. a substance with a pH between 7 an 14.
3.A substance that tastes sour and dissociates in water would best be characterized as a(n):Â a. acid
4.Angela is working with a substance that is commonly found in detergents. This substance has a pH of 8.1. Angela is working with a(n):Â b. base
5. is a solution that resists changes in pH by accepting H+ ions or donating H+ ions when the levels change:Â d. A buffer
6.Farmers do not need to know the impact of pH levels in order to be effective:Â False
7.Most rain water is between the pH of :Â a. 6 and 7
8.Human blood has a pH of:Â c. 7.4
9.Ellen is jogging. As her body's metabolism becomes more active, carbon dioxide levels increase, resulting in a decrease in pH. Fortunately, her in the blood protect against large changes in pH:Â c. buffers
10.Ellen is jogging. As her body's metabolism becomes more active, how will her body protect itself initially against acidosis?:Â b. Ellen's body will regulate pH by using buffers.