1. 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’?

2. 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

3. 5.2 Identifying Physical & Chemical Changes
See lab write-up on page 180
Note: Safety Precautions for Activities are highlighted in red.