Learning goal: Know the properties of a polar substance
and why water’s polar nature makes it a universal solvent.
Page 16
Tues-Wed July 29-30, 2014
Warm-up: It is emphasized to NOT fix your gaze for more than a couple of seconds on
any single object. Keep your eyes moving and your head on a swivel to helps you to be
observant and alert. A simulation will demonstrate this phenomenon of motion
blindness.
http://www.msf-usa.org/motion.html
Where can you apply this lesson?
Learning goal: Know the properties of a polar substance
and why water’s polar nature makes it a universal solvent.
Page 16
Tues-Wed July 29-30, 2014
Learning goal: Know the properties of a polar substance and why water’s polar
nature makes it a universal solvent.
Learning scale:
1
2
3
4
Define polar
Explain the
Can show why
Can determine
interaction of
polar substances
which essential life
atomic charges that are soluble in water
processes are
make a water
and non-polar
dependant on the
molecule
polar at home
substances
areend of class,
properties
of
Student’s self-evaluation:
Complete
or at the
use the
insoluble
polarity
4-3-2-1-0 system of understanding
Student’s self-evaluation: Complete at home or at the end of class, use the
4-3-2-1 Learning scale (two to three sentences).
Homework: None.
4
Polarity in
life
processes
3
Polarity
and
solubility
2
Water as a
polar
molecule
1
Define
polarity
Learning goal: Know the properties of a polar substance
and why water’s polar nature makes it a universal solvent.
Page 15
Monday July 28, 2014
How water dissolves ionic compounds: essential for and life
The + sodium atoms are
drawn to the – pole
(oxygen) of the water
molecules.
The – chlorine atoms are
drawn to the + pole
(hydrogen) of the water
molecule.
Ionic bonds break.
Covalent bonds remain.
Hydrogen bonds remain.
4
Polarity in
life
processes
3
Polarity
and
solubility
2
Water as a
polar
molecule
1
Define
polarity
Learning goal: Know the properties of a polar substance
and why water’s polar nature makes it a universal solvent.
Page 15
Monday July 28, 2014
Non polar substances, such as lipids will not dissolve
Non-polar substances have no charges
“Like dissolves like”
4
Polarity in
life
processes
3
Polarity
and
solubility
2
Water as a
polar
molecule
1
Define
polarity
Learning goal: Know the properties of a polar substance
and why water’s polar nature makes it a universal solvent.
Page 17
Tues-Wed July 29-30, 2014
Review of water: use the link below to access a 5 minute film
http://youtu.be/DAilC0sjvy0
Film questions:
1. What three “states” is water commonly found in?
2. What other substances are commonly found in these three states?
3. What happens to the mass and volume of water as it freezes? **CC**
4. What type of bonds hold the oxygen and hydrogen together in a water
molecule?
5. Why do molecules of water stick together?
6. What are cohesion and adhesion?
7. Why will an electric current travel through salt water, but not through pure
water? **CC**
4
Polarity in
life
processes
3
Polarity
and
solubility
2
Water as a
polar
molecule
1
Define
polarity
Learning goal: Know the properties of a polar substance
and why water’s polar nature makes it a universal solvent.
Page 17
Tues-Wed July 29-30, 2014
Mickey Mouse water molecule.
Complete the assignment as directed. It should be ready to hand in before
you leave today. The project will be put on page 17, overtop the film
questions and answers.
4
Polarity in
life
processes
3
Polarity
and
solubility
2
Water as a
polar
molecule
1
Define
polarity