1. Adhesion, Cohesion, Surface Tension

2. Water Structure Chemical Formula H2O
H2O molecules are held together by covalent bonds

3. Polarity Oxygen is “stronger/more greedy” than hydrogen.
The O and H2 atoms share the electrons unequally which causes a + and – charge to appear on opposite ends of the H2O molecule.

4. Cohesion Cohesion = attraction between substances of the same kind.
Hydrogen Bonding
This attraction between H2O molecules causes a condition known as Surface Tension

5. Surface Tension
High surface tension allows long H2O columns to be drawn from roots to leaves.

6. Adhesion
Adhesion= an attraction between different substances and explains mutual attraction of polar molecules.
Example: Capillary Action- the process of moving H2O molecules up a narrow tube.

7. Polarity & the Universal Solvent
Polarity enables many substances to dissolve in H2O.
Ionic Compounds & polar compounds can be dissolved in H2O.
Example: Sodium Chloride (NaCl)
Nonpolar molecules do not dissolve well in H2O
Example: Oils