1. Chemical characteristic properties

2. Reaction to litmus paper
Can identify if a substance is acidic or basic.
Acid
Base

3. Reaction to cobalt chloride paper
Turns pink in the presence of water.
no water
with water
Water goes into the crystal and changes the color of the crystal from blue to pink

4. Reaction to limewater Turns Cloudy in the presence of CO2
CaOH2 – solution – CaCO3 precipitates

5. Reaction to glowing splint
Splint reignites in the presence of oxygen
Reignite fire in fireplace through blowing, hair dryer, bellows
A pair of bellows uses the same principal to reignite a fire

6. Reaction to burning splint
An explosion will occur in the presence of hydrogen.
Magnesium and acid in test tube plus match
One more chemical characteristic property to look at:
Hindenburg in 1937

7. One more chemical characteristic property that we need to talk about  what’s this? Have you ever wondered why some of them are orange, some green and some pink?

8. Reaction to an open flame
The color of the flame may indicate the presence of certain substances. K Na Ba

9. Chemical characteristic properties
Gas
Liqid
Certain metal salts
Hydrogen
Burning splint test
 explosion
Water
Cobalt chloride paper
 turns pink
Flame test
 Flame will take a characteristic colour depending on the metal
Oxygen
Glowing splint test
 re-ignition
Acid /Base
Litmus paper
 acid > red
base > blue
Carbon dioxide
Limewater test
 gets cloudy

10. Homework Workbook pages 17 and 18 (# 1 to 6)
Ask students to write in their agenda