Week 1: The Chemistry of Water

Question 1

Chemical Composition of Water

Answer 1

H2O
Oxygen greater attraction for electrons, electrons stay closer to oxygen, partial negative charge.
Polar Bond
Polar Molecule

Question 2

Hydrogen Bond

Answer 2

Slightly positive hydrogen interacts with slightly negative oxygen of another water molecule.
Weak bond.

Question 3

Cohesion

Answer 3

Polar nature of water attracts one another - stick together.
Universal solvent - easy to dissolve other things.

Question 4

Biological Importance of Water

Answer 4

Main constituent of body.
Infant: 80
Male: 60
Female: 50
Senior: 45

Question 5

Solvent

Answer 5

Dissolving agent

Question 6

Solute

Answer 6

Dissolving substance

Question 7

Metabolic Reactions

Answer 7

Importance of water
Hydrolysis or Dehydration Synthesis.
All chemical reactions in body occur in water.

Question 8

Lubricative… (water)

Answer 8

Cleansing and transport functions

Question 9

Helps regulate body temperature

Answer 9

Water absorbs heat w/o greatly increasing temp.
Warm blood flows to under skin, trasnferred out as radiant heat.
Sweat glands.

Question 10

Water moderates air temperature

Answer 10

Absorbing heat from air, releases stored heat to air that is cooler.

Question 11

Body Water Breakdown

Answer 11

2/3 Intracellular
1/3 Extracellular

Question 12

Extracellular Water Breakdown

Answer 12

80 - interstitial
20 - plasma

Question 13

Hyrdolysis

Answer 13

Decomposition of substance and water.
Adding water to a molecule to break it.

Question 14

Dehydration Synthesis

Answer 14

Larger molecules being created from smaller monomers where a water molecule is released.