1. SMOKE BOMB

2. Materials Potassium nitrate Sugar (sucrose or table sugar) Chemicals Used to Color Flames

3. Red - strontium salts Orange - calcium chloride Yellow - sodium nitrate Green - barium salts, such as barium nitrate

4. Apparatus Hotplate Satay Stick Aluminum foil Lighter Mould Wick Lighter

5. Procedures Add sugar to potassium nitrate in the ratio of 2:3 on a piece of aluminum foil. Add chemical that colour the flame, sparingly. Heat the mixture on a hotplate on low heat. Stir the mixture well using a satay stick.

6. When the mixture turned brown, take it off the heat and wrap the mixture with that aluminum foil. When it has hardened – takes about 10minutes – light it up and coloured flames will be produced.

7. Chemistry Behind Sugar – fuel Potassium nitrate- oxidizer Salt- organic dye 48NaNO 3 + 5C 12 H 22 O 11 - 60CO 2 + 55H 2 O + 24N 2 + 24Na 2 O