1. pH

2. What is pH? pH measures the amount of H+’s in a solution
Water splits to form ions
H+ and OH- H+ H+ H+ H+ H+ H+

4. Acid <7 on pH scale Higher concentration of H+ in solution than OH-
Properties
Sour taste
Ability to turn litmus paper from blue to red
Proton donor
More acidic
Less acidic

5. Basic/Alkaline >7 on pH scale More OH-, Less H+ Properties Slippery
Bitter
Proton recipient
Alkaline
Less Alkaline

6. Neutral
pH of 7
Water!
Balance of H+ and OH- ions

7. Interpreting the pH Scale
Each decrease in number (more acidic) represents a 10x increase in the number of H+ ions

8. Testing pH Indicator: Chemical that changes color Litmus Test pH Paper
Test to determine pH
Litmus Test
Positive Acid Test: Turn blue litmus paper to red
Positive Alkaline Test: Turn red litmus paper to blue
pH Paper
Changes color
Match color to key to determine the pH