PROPERTIES OF WATER INVESTIGATION
OBJECTIVE: Demonstrate and analyze the properties of
adhesion, cohesion, surface tension and polarity.
PROCEDURES:
1. Put a drop of water between two glass slides. Try to pull
the slides apart. Describe what happens.
2. How many drops of water can be placed on a penny
before they spill off?
3. Distribute pepper flakes or coffee grounds over the
surface of a beaker of water. Describe what happens.
4. Add a drop of dish detergent to the beaker with pepper
flakes. Describe what happens.
5. ALL TEAMS WILL PERFORM THIS AT THE SAME
TIME! In your team, have one student stand on a chair or
counter holding one end of a string. Have a second
student hold the other end of the string over a beaker on
the floor. The third student will slowly and carefully
pour water from a beaker over the string (place a tub
below the point of pouring). Describe what happens.
ANALYSIS AND CONCLUSIONS:
1. Write an explanation in terms of adhesion, cohesion,
surface tension and hydrophilic/hydrophobic interactions
for each activity.