Water

Question 1

Dipole Moment

Answer 1

Determined by the magnitude of the charges and the distance between them

Question 2

Hydrogen Bonding

Answer 2

The electrostatic attraction between a hydrogen atom in one polar molecule (as in water) and a small electronegative atom (as in oxygen)

Question 3

Hydrophilic Interactions

Answer 3

Charged and polar
Water can disrupt hydrogen bonds between sucrose molecules
Break into small pieces of the same molecule and not into ions

Question 4

Hydrophobic Interactions

Answer 4

Uncharged and nonpolar
No free charge because the electrons are being shared equally

Question 5

Amphipathic

Answer 5

Regions of both hydrophobic and hydrophilic

Question 6

Amphipathic Interactions

Answer 6

The polar region forms hydrogen bonds with water while the nonpolar regions interact with each other

Question 7

Structure of Triglycerides (Fats)

Answer 7

Glycerol (alcohol group), Ketone (fatty acid), Triglyceride (neutral fat), 3 water molecules

Question 8

Surface Tension

Answer 8

Kinetic energy causes the water molecules to be in constant random motion
The air-water interface experiences sideward and downward intermolecular forces
Hydrogen bonds between H2O molecules form a lattice of water molecules which creates high surface tension

Question 9

Why does ice float on the surface?

Answer 9

Less density with much more distance than in liquid therefore less kinetic energy

Question 10

Diffusion

Answer 10

Molecules or ions in solution go from regions of higher to regions of lower concentration

Question 11

Osmosis

Answer 11

The process of water moving from a region of higher to lower concentration through a selectively water-permeable membrane

Question 12

Ion Diffusion via Channels

Answer 12

Ions and water molecules are bouncing in random directions due to thermal kinetic energy