pepper science experiment

Make pepper hate you! 

  Materials:
1.  Bowl
2.  Water
3.  Pepper
4.  Toothpick
5.  Liquid soap

Step 1:
Fill a bowl with water. Sprinkle pepper throughout the top of the bowl.
(This is a perfect use for the little paper pepper packets you get from
restaurants, but a pepper shaker will additionally work.)

Step 2:
Dip a toothpick with the aid of the floor of the water to the bottom of the
bowl. What do you observe?

Step 3:
Pull the toothpick out of the water. Now dip one provide up of the
toothpick into some liquid soap. Put the soapy cease of the toothpick into
the water and watch what happens.

The Science Behind It:

The pepper flakes will go with the flow on pinnacle of the water. Pepper is hydrophobic, meaning pepper is no longer attracted to water. Pepper, in contrast to salt, will through no capability dissolve in
water. The pepper floats on the “skin” of the water created by using way of ground tension.
Although the smooth toothpick penetrates the water, it doesn’t trade the surface nervousness without applicable at the insertion point.

Since cleansing cleaning soap is a surfactant (short for flooring acting agent), it decreases the
surface tension. The cleansing cleaning soap enters from the toothpick thing and quickly disrupts
the surface tension. The water molecules try to maintain the flooring tension and
run away from the soap. The floating pepper indicates the water molecules running away from the soap.