Water Properties - Needham.K12.ma.us

advertisement
Water Properties
Theme: Structure Meets Function
Structure of Water
• Bonds within a water molecule: polar covalent
• Bonds between water molecules: hydrogen
Which water property?
• Watch teacher demo of ice cubes and butter
cubes!
Which water property?
• Did you do a lab to demonstrate this property
in middle school?
Which water property?
Which property?
• Watch the teacher heat alcohol and water!
Which property?
Which property didn’t we see?
• Example: Body’s
fluids are
“suspensions” and
“solutions”
– What types of things
gs dissolve in the
body’s fluids?
– What types of things
are “suspended”?
Why can’t they
dissolve?
Is water really the universal solvent?
• You will complete four experiments with
water.
• You will use your data to answer the
question…like the virus question; there is not
really a wrong or right answer…we are looking
for you to use evidence to support your
decision!
• Could you design an experiment to test one of
the other properties?
Dissociation of water and pH
• How do the structures of acids and bases
change the neutral nature of pure water?
• HW: Draw a pH scale in your notes;
identifying values for acids, bases, and neutral
& plot 3 examples (each) of acids & bases.
Download