Water: Test 1 Flashcards
What is a polar molecule?
If the center of negative charge does not coincide with the center of the positive charge
Usual behavior of water is due to?
Structure or molecule and hydrogen bonds
What is dipole?
Measure of magnitude of the charge displacement in a polar covalent compound
What are dipole dipole interactions?
Attraction of the positive end for one polar molecule for the negative end of another polar molecule
Water molecules have _______ dipole moments and are _______ polar.
High dipole moments and are highly polar
What forms between water molecules?
Hydrogen bonds
Water forms what with polar molecule?
Hydrogen bonds
Do water molecules interact with charged molecules (salts, proteins)?
Yes– water interacts with charged molecules
What is the maximum number of hydrogen bonds one molecule of water can have?
4
Compared specific heat of oil, specific heat of water is?
Higher
What type of freezing causes formation of large ice crystals
Slow freezing
During slow freezing, water/ice volume increases approx?
8-9%
Lipids are nonpolar:
- Are soluble or non?
- Can they form hydrogen bonds?
- Non soluble
2. Cannot form hydrogen bonds
What percent of water molecules bound by hydrogen bonds when in liquid phase?
70-80%
What strength do hydrogen bonds have?
Weak bonds
