1. The pH scale

2. pH Measure of acidity of a solution 0 to 14
Water is neutral because of equal amounts of hydrogen and hydroxide ions.
Acidic solution has excess of hydrogen ions.
Alkaline soltion has excess of hydroxide ions.

3. pH means power of hydrogen
At ph =7
Hydrogen ions at concentration of 1 x 10^-7
At ph =6
Hydrogen ion concentration of 1 x 10^-6
Etc
Ph change of 1 unit is change in hydrogen ion concentration of 10
Ph change of 2 is change in hydrogen ion concentration of 100.

4. Equation

5. How to determine pH
PH Meter
Universal indicator

6. To Do
Read page 215
Answer questions 1 to 8 on page 216