section on adhesion. Calculate the molarity of each solution you generated and record the molarity in
Data Table 1.
Question: How long did it take?
Question: Which is the solvent?
Question: Which is the solute?
Data Table 1: NaCl solution molarity concentrations
Solution #
Grams NaCl added
Molarity (M)
#1
5
#2
10
Hydrogen Bonding, Expansion on Freezing, Specific Heat, Evaporative Cooling
Figure 3: 5 H-Bonded Water Molecules
Water tends to "hang out" in groups of five molecules. This is due to the intramolecular hydrogen
bonding that occurs between different water molecules.
Question: How many hydrogen bonds are present in
Figure 3 (shown above)? Question: What properties of
water molecule allow hydrogen bonds to form?
Question: Water expands when it freezes, forming a
lattice type structure as shown in the Figure 4. Using
information, explain why ice floats.
Figure 4: Lattice formed by water molecules in ice.
