honors biology - water

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WATER WATER AND THE FITNESS OF THE ENVIRONMENT

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Page 1: Honors Biology - Water

WATER

WATER AND THE FITNESS OF THE ENVIRONMENT

Page 2: Honors Biology - Water
Page 3: Honors Biology - Water

OUTLINE

Polar Molecule and Hydrogen Bonds

Properties of Water

Acid and Base

Page 4: Honors Biology - Water

H BONDS

Page 6: Honors Biology - Water

ALL ABOUT WATER

Page 7: Honors Biology - Water

1. COHESIVE BEHAVIOR

Page 8: Honors Biology - Water

Surface Tension

Page 9: Honors Biology - Water

2. MODERATION OF TEMPERATURE

Page 10: Honors Biology - Water

HIGH SPECIFIC HEAT

Water = 1 cal/g/ºC

Related to bonding:

• Heat is absorbed when hydrogen bonds break

• Heat is released when hydrogen bonds form

High specific heat of water minimizes temperature fluctuations.

Page 11: Honors Biology - Water

HIGH HEAT OF VAPORIZATION

Heat a liquid must absorb for 1 g to be converted to gas.

Evaporative cooling.

Page 12: Honors Biology - Water

3. EXPANSION WHEN FROZEN

ICE FLOATS

Page 13: Honors Biology - Water

4. SOLVENT OF LIFE

Terms you should know!

•Solution•Solvent•Solute

Page 14: Honors Biology - Water

Water dissolves ionic…

Page 15: Honors Biology - Water

…and nonionic polar compounds.

Page 16: Honors Biology - Water

HYDROPHOBIC

Scared

Page 17: Honors Biology - Water

HYDROPHILIC

Loving

Page 18: Honors Biology - Water

ACIDS AND BASES

Page 19: Honors Biology - Water

POSSIBLE SHIFTS

Changes in concentrations can drastically affect the chemistry of a cell

(H+ Ions - Hydrogen)

Page 20: Honors Biology - Water

ACID

A substance that increases the H+ concentration of a solution.

pH values less than 7

[H+] > [OH-]

Page 21: Honors Biology - Water

BASE

A substance that reduces the H+ concentration of a solution.

pH values greater than 7

[H+] < [OH-]

Page 22: Honors Biology - Water
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Page 24: Honors Biology - Water

BUFFERS

Minimize changes in concentrations of H+ and OH- in a solution.

Page 25: Honors Biology - Water

IN THE ENVIRONMENT