Friday, December 10, 2010

Water: Beads of Color

Place a thin layer of baby powder on a small plate. 

Place several drops of food coloring on the powder and observe the drops. 

The drops form a sphere, as the water molecules would rather cling to each other than to the baby powder.

Now, dip the end of a toothpick in some liquid soap.  Touch the soapy end of the toothpick to the food color beads.  Observe.

The beads spread apart because the soap interferes with the bonding that occurs between the water molecules.

No comments:

Post a Comment