Fb-3 Capillarity
Aim
To demonstrate capillarity in water and mercury.
Apparatus
- Capillarity Tubes
- Mercury Capillarity Tube
- Water and Food Dye Solution
Capillarity Tubes (Water and Food Dye) and Mercury.
Description
For water the attractive force between a glass and a water molecule (adhesion) is greater than that between two water molecules (cohesion). The result is that the water rises to a height depending on the tube diameter. For mercury the level in the capillary tube is depressed since in this case the forces of cohesion exceed those of adhesion.