L4: pH scale Learning Objectives: 1.Use the pH scale to describe substances as weak or strong acids or alkalis. 2.Describe how universal indicator is used.

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Presentation transcript:

L4: pH scale Learning Objectives: 1.Use the pH scale to describe substances as weak or strong acids or alkalis. 2.Describe how universal indicator is used to determine the pH of a substance. 3.Name the pH of a few common substances.

The pH scale is used to describe how acidic or how alkaline a substance is.

The pH scale goes from Acid Above 7

Universal Indicator Universal indicator (UI) is a more accurate indicator. UI changes colour depending on the specific pH of a substance. We are going to do a practical to test the pH of a few different substances using universal indicator.

Make your own pH scale Make a pH scale poster.