The PPT is meant educational purpose by me on accordance to CBSE class 11 Syllabus

1. PROPERTIES OF
WATER

2. I. Structure of the
Water Molecule
Polarity and Hydrogen Bonds

4. Structure of the Water
Molecule
H + H + O  H2O
(chemical formula)
H H
O
Structural formula

5. Water Molecules are Polar
Polar – has a positive end and a negative
end. As a result, polar molecules have a
slightly negative charge.
H+
H+
O-

6. How is a Water Molecule
Polar?
 The oxygen atom attracts the shared electrons more
strongly than the hydrogen atoms do.
 As a result, the electrons spend more time near the
oxygen atom than they do near the hydrogen atoms.
H+ H+
O-

7. How Do Water Molecules
Bond With Each Other?
 Hydrogen bonds form between neighboring water
molecules
 The positve H of one molecule “sticks” to the negative
O of another molecule.

8. Hydrogen Bonding
They do not share electrons, so they
are weaker than covalent bonds.
They easily break and form again

9. Cold Call Questions:
 What does polar mean?
 What makes a water molecule polar?
 What kind of bonds exist between water molecules?
 How does a hydrogen bond form?
 What kind of bonds does a water molecule have within
the molecule itself?
 What kind of bond is stronger?
 Why is that important?

10. II. Physical
Properties and
States of Matter

11. Physical Properties
 Water in its pure state
is…
 Colorless
 Odorless
 Transparent
 Distilled water is
considered “pure”
 Rain water is not
 Precipitation of any kind
(snow, rain, hail)
contains dissolved
minerals, gasses, acids,
dust, pollen grains,
viruses and
microorganisms!

12. Water pH
 Pure water (distilled)
has a pH of 7
 Seawater is slightly
basic, with a pH of
about 8
 Most natural water has a
pH of between 6-8
 Acid rain can have a pH
as low as 4