The document describes several chemistry demonstrations that will be performed at a scientific demonstration event, including turning a copper-silver-golden coin different colors through electrochemistry, making bubbles vanish using a soap solution and dry ice by generating carbon dioxide gas, writing with fire using the oxygen produced from igniting sodium nitrate, and changing the color of a solution containing lead nitrate and potassium iodide through a chemical reaction. The demonstrations are intended to illustrate chemical principles and reactions through hands-on experiments.

1. Scientific Demonstrations
Department of
Chemical Sciences

2. Magic Water

3. Colourless
pH ̴ 6
pH > 8.2
Origin of Colour

4. Electrochemistry!
Copper-Silver-Golden COIN
Think chemistry behind it!

5. Vanishing Bubble
Soap Solution + Dry Ice 
WHY??
Bubbles Due to CO2
Gas

6. Fire Writing
LOGIC!Ignition of Sodium Nitrate
generates oxygen!

7. Golden Rain
Lead Nitrate + Potassium Iodide Lead Iodide + Potassium NitrateWHY??

8. Vanishing Water

9. Wine-Milk Shake-Fruit Juice