Physical vs. Chemical Properties

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Chemical vs. Physical.

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Presentation transcript:

Physical vs. Chemical Properties Study the warning label found on this bottle of chlorine bleach. Is this hazard a result of a chemical property or a physical property? Justify your answer. Can you define ‘physical property’ in your own words? ‘Chemical property’?

Physical and Chemical Changes 5.1 Visible Change (Evidence) Example Picture A new colour appears. universal indicator turning purple in a base Heat or light is produced or absorbed. firefly lighting up Bubbles of gas are formed. fizzing tablet in water A solid material (a precipitate) forms in liquid. Lead (II) Iodide forms when Lead ((II) Nitrate and Sodium Iodide are mixed The change is (generally) difficult to reverse. a candle burning physical property chemical property

5.2 Identifying Physical & Chemical Changes See lab write-up on page 180 Note: Safety Precautions for Activities are highlighted in red.