1. Aim: How are acids and bases different?
HW: Read Page #41-43 Questions #2 and #4

2. Can you group the following solutions?

3. How can solutions be classified?
ACIDS
NEUTRAL
BASES

5. AAAAAAA N BBBBBBB Acid Neutral Base pH 0 - 6 pH 7 pH 8 - 14
Most acidic
Most basic
Acid Neutral Base
pH pH pH

6. Acids vs Base
Acids have pH below 7 because they have more H+ ions than OH- ions.
Acids have more H+
Bases have pH above 7 because they have more OH-

8. Test the solutions

11. What is the pH of your body?
pH of fluids in most cells in the human body must generally be kept between 6.5 and 7.5
Too high or too low will affect chemical reactions that take place within the cells.

12. The action of enzymes varies with pH
What is the optimum pH in the stomach.
What is the optimum pH in the intestine.
What does the term “range” mean?