Describe any precaustions you should take when setting up your boiling water apparatus.

1. Always  work with caution.

2. Set up on a steady surface away from flammable materials.

3. Do not heat a water apparatus above its flash point.

4. Water level should be regularly monitored, and filled with distilled water

   only.

5. Ensure that the cover is closed to prevent evaporation and to help    

   reaching high temperatures.

both adhesion and cohesion are attractions.

they are different in that adhesion is the force of attraction between the molecules of two different substances, whereas cohesion is the force of attraction between molecules of the same substance.

possible examples include capillary action, in which the adhesion between water and glass causes the water to rise in a narrow tube against the force of gravity.

because of hydrogen bonding, water is extremely cohesive.

this causes molecules on the surface of water to be drawn inward, which is why drops of water form beads on smooth surfaces.

hope this .