Diffusion - Food Color In Water

Purpose

To demonstrate diffusion.
 

Equipment

Beaker of water, food coloring.

 

Images

i6-23

Description

A drop of food coloring is placed gently into a beaker of water. In a few minutes the food coloring will diffuse through the entire beaker of water. It might be argued that residual currents in the water account for much of this " diffusion." Maybe so, but it gets the point across even if you mention this.