Water Flow Tricks

MATERIALS :

• Conical flask
• Acetic acid
• Sodium bicarbonate
• water
• Tracing paper

PROCEDURE :

• Take a conical flask.
• Add concentrated acetic  acid and water to the half.
• Take sodium bicarbonate in a tracing paper and fold it well.
• Put into the conical flask
• Now the water flows down.

WHY ?
     Acetic acid react with sodium bicarbonate solution that time carbondioxide gas is evolved. So the water flows down.