Properties and Structure of Water

The video explains why water (H2O) is a polar molecule. It begins by confirming water's polarity and proceeds to draw its Lewis structure, showing the distribution of valence electrons. The video then discusses the hybridization of oxygen in water, identifying it as sp3 hybridized, and explains the VSEPR theory to describe the bent shape of the water molecule. Finally, it analyzes the polarity of water by discussing the electronegativity difference between oxygen and hydrogen, leading to a net dipole moment due to the molecule's bent shape.

What is the conclusion about the polarity of water?

• Water has no polarity.

• Water's polarity depends on temperature.

• Water is a polar molecule.

• Water is a nonpolar molecule.

How many valence electrons does oxygen have in the Lewis structure of water?

• 2

• 4

• 6

• 8

How many bonds does oxygen form in a water molecule?

• One

• Four

• Two

• Three

What is the hybridization of oxygen in a water molecule?

• sp3

• sp2

• sp

• sp3d

What is the steric number of oxygen in water?

• 4

• 3

• 5

• 2

According to VSEPR theory, what is the shape of a water molecule?

• Bent or V-shaped

• Trigonal planar

• Tetrahedral

• Linear

Why does the water molecule have a bent shape?

• Due to the repulsion between lone pairs

• Because of the hydrogen bonds

• Due to the high temperature

• Because of the ionic bonds

Which element in water is more electronegative?

• Hydrogen

• Both have the same electronegativity

• Oxygen

• Neither is electronegative

What causes the dipole moment in water molecules?

• The presence of ionic bonds

• The high temperature of water

• The symmetrical shape of the molecule

• The difference in electronegativity between hydrogen and oxygen

What is the result of the dipole moments in water not canceling each other out?

• Water has a net molecular dipole moment

• Water becomes nonpolar

• Water loses its polarity

• Water becomes a gas