1. Acids and Bases
What is the pH scale?

2. Ions created from water
If a water molecule breaks apart two ions form:

3. Hydrogen Ion H+
The hydrogen ion is formed from one of the hydrogen atoms.
The hydrogen ion has lost its electron so it has a positive charge.

4. Hydroxide Ion
OH-
The oxygen and the other hydrogen atom stay connected together and are called the hydroxide ion
The hydroxide ion gained an electron in the split so it has a negative charge

5. 0 is the most acidic – many H+ ions, few OH- ions
Basic
Substances dissolved in water can create different amounts of H+ or OH- ions
0 is the most acidic – many H+ ions, few OH- ions
7 is neutral – equal H+ and OH- ions
14 is the most basic – few H+ ions, many OH- ions

6. H+ Cl- Acid or Base? This is hydrochloric acid
Hydrochloric acid is produced in your stomach

7. H+ Acid or Base? This is carbonic acid
Carbonic acid gives soda its fizz

8. OH- Acid or Base? This sodium hydroxide, a strong base
Sodium hydroxide is used in drain pipe cleaners to dissolve clumps of hair that clog a pipe

9. Acid or Base? H+
OH-
Did I trick you?
Water is neutral

10. Short Video on Acid Rain