Water Flashcards
(22 cards)
Hydrolysis/Catabolic
Disrupts/breaks a bond
Digestion in mouth
Dehydration synthesis/Anabolic
Joins molecules
Glucose➡Sucrose
Exchange
Double replacement
High Surface Tension
Allows things to float
Capillary Action
Movement of water up a porous surface (plants)
Imbition
Movement of water into wood or seeds
Heat capacity
The resistance to temp. change
H.C. of water = 1
High Vaporization Point
Having cells made of water, in high water doesn’t change easily.
Freezing Expands the Solid
Water expands due to the stability of hydrogen bonds
Amphoteric/Amphiprotic
Water can act as an acid or a base aka as a “buffer”
Moderates pH
Ability as a Solvent
Water dissolves ionics, polar covalents, and acids and bases.
Acids
H+ donors (hydronium ions)
Bases
OH- donors (hydroxide ions)
pH rule
pH=4 so [H+]= 1 x 10^-4 (.0001)
Buffer
Moderates pH (water)
Carbonic Acid Buffer System
1) What does it do?
2) Equation
1) Regulates breathing, CO2 + H2O in blood plasma➡ H2CO3 = no good
2) H+ + HCO3-
Chemoreceptors
In neck (carotids) monitor plasma pH
Osmosis
The movement of water through:
- a membrane
- down a gradient
- until equilibrium reached
- MUST HAVE WATER POTENTIAL*
Osmotic Potential
The potential to gain water
“Water moves from low osmotic potential into higher osmotic potential”
Osmotic Pressure
AKA “water pressure”
“Water moves from high osmotic pressure into low osmotic pressure
Low osmotic pressure = ?
High osmotic potential
High osmotic pressure = ?
Low osmotic potential
