1. Water Properties REVIEW FOR QUIZ
On Thursday January 25, 2017

2. REVIEW FOR QUIZ
Is water polar or nonpolar?
POLAR

3. What is the pH of water?

4. Factors that affect viscosity
Temperature
-If it is hot, it has less viscosity
Water
-If it has more water, it has less viscosity

5. Density
MORE
Water is _________ dense than ice, this is why ice floats on top of water

6. What is heat capacity and why is it important?
the amount of energy needed to change the temperature by 1 degree
Allows Earth to have a livable climate as the Earth is made up of 70% bodies of water

7. Which has a greater heat capacity?
Water (Specific heat = J/g)
Air (Specific heat = J/g
WATER

8. Understand solubility
Increases
As temperature _______________, the amount
of solute the liquid can hold _______________
Increases

9. Know where to label: Saturated, Unsaturated, Supersaturated

10. What material forms a crystal from a SUPERSATURATED solution?
Precipitate

11. Be able to identify each property from a given scenario AND explain why you chose your answer

12. pH - A scale used to tell how acidic or how basic a something is
For mother’s day you bought your mom blue hydrangeas. You planted the flowers in her garden and after a few weeks the flowers turned from blue to pink. You tested the soil and discovered that the garden soil had an acidity of 7.2
The example talks about how the change in pH changed the color of the flowers from blue to pink

13. Polarity – “like dissolves like”
You are cleaning your pan using hot water but notice the pan is not completely clean. There is still grease left after you washed it with water.
Water cannot remove the grease because water is polar and grease is nonpolar. She will need a non-polar cleaner

14. Heat Capacity - the amount of energy needed to change the temperature by 1 degree
Your family travels to Lake Geneva one warm weekend in May. When you get into the lake the water is cold even though the temperature is 87 degrees.
Water has a greater heat capacity that’s why it needs more heat/energy to heat up

15. Solubility – the ability to dissolve a substance
Last week you were late to school because your car’s windshield was covered in frost. It did not snow the night before.
The warm air from the car causes the moisture from the outside to settle on the windshield and become frost

16. Crystallization - Supersaturated liquid solution becomes a pure solid crystal
A geode forms from volcanic rock, over millions of years its outer shell hardens and water containing silica precipitate form the inner walls of the geode
Crystals form a solid (precipitate) that were once part of a supersaturated solution

17. Viscosity – the resistance to flow
You are melting chocolate to make chocolate covered strawberries but the chocolate is too thick. You add coconut oil to make the chocolate thinner so it will easily flow and cover each strawberry
You want the thick chocolate to be thinner

18. Density - How much mass is found per volume
Pyrite (fool’s gold) and gold look almost exactly the same. But when they are examined they have different masses even though they have the same volume.
Gold has a higher density than pyrite. Even though you had the same amount they have a different mass