1The water molecule is thus a
polar molecule
2Polarity allows water molecules to
form hydrogen bonds with each other
3Four of water’s properties that facilitate an environment for life areCohesive behavior
Cohesive behavior
Ability to moderate temperature
Expansion upon freezing
Versatility as a solvent
4cohesion
Hydrogen bonds hold water molecules together
5Hydrogen bonds hold water molecules together
cohesion
6Cohesion helps the transport of
water against gravity in plants
7Adhesion
attraction between different substances, e.g., between water and plant cell walls
8attraction between different substances, e.g., between water and plant cell walls
Adhesion
9Surface tension
is a measure of how difficult it is to break the surface of a liquid
10is a measure of how difficult it is to break the surface of a liquid
Surface tension
11Water..... heat from warmer air and..... stored heat to cooler air
absorbs, releases
12Heat is absorbed when hydrogen bonds break
hydrogen bonds break
13
Heat is released when
hydrogen bonds form
14solution
a liquid that is a completely homogeneous mixture of substances
15solovent
the dissolving agent of a solution
16solute
he substance that is dissolved
17aqueous solution
where water is the solvent
18hydrophilic (ionic, polar)
substance is one that has an
affinity for water
19substance is one that has an
affinity for water
hydrophilic (ionic, polar)
20hydrophobic (nonpolar substances)
substance is one that does not have an affinity for water
21substance is one that does not have an affinity for water
hydrophobic (nonpolar substances)
22Molecular mass
is the sum of all masses of all atoms in a molecule
23is the sum of all masses of all atoms in a molecule
Molecular mass
24Molarity
is the number of moles of solute
per liter of solution
251 mole (mol) =
6.02 x 10^23 molecules
26acid
a substance that increases the H+ concentration of a solution
27a substance that increases the H+ concentration of a solution
acid
28Base
a substance that reduces the H+ concentration of a solution
29a substance that reduces the H+ concentration of a solution
Base