The pH scale.

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Presentation transcript:

The pH scale

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.

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.

Equation

How to determine pH PH Meter Universal indicator

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