mcb450-2s07 - Lecture 2 Water: The Medium of Life Fred...

Info iconThis preview shows pages 1–17. Sign up to view the full content.

View Full Document Right Arrow Icon
Lecture 2 Water: The Medium of Life
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Fred Diehl – Univ. of Virginia Fred
Background image of page 2
Physical Properties of Compounds Compound MP ( o C) BP ( o C) H vap (cal/ g) H fus (cal/ g) H 2 O 0 100 540 80 H 2 S -83 60 132 16.7 NH 3 -78 -33 327 84
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Bonding Each molecule of water can be hydrogen-bonded to four other water molecules.
Background image of page 4
Solvent Properties of Water Example – Solubility of sodium chloride Sodium and chloride ions are hydrated.
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Water’s Dielectric Constant Solvent D Water 78.5 Methanol 32.6 F = e 1 e 2 /Dr 2
Background image of page 6
Hydrophobic Interactions Clathrate (“iceberg”) structure
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Amphipathic Molecules
Background image of page 8
Micelle Formation
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Osmotic Pressure Π = iRTm, where I = number of ions, R=gas constant, T=absolute temperature, m = molality
Background image of page 10
Ion Product of Water K W = 10 -14 = [H + ] [OH - ] In precisely neutral water, [H + ] = [OH - ] = 10 -7 M
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Definition of pH pH = -log [H + ] = log (1/H + )
Background image of page 12
pH Scale
Background image of page 13

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Dissociation of Strong Electrolytes Example: HCl
Background image of page 14
Dissociation of Weak Electrolytes Example: Acetic Acid
Background image of page 15

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Henderson-Hasselbalch Equation pH = pK + log ([A - ]/[HA])
Background image of page 16
Image of page 17
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/07/2008 for the course MCB 450 taught by Professor Mintel during the Fall '07 term at University of Illinois at Urbana–Champaign.

Page1 / 26

mcb450-2s07 - Lecture 2 Water: The Medium of Life Fred...

This preview shows document pages 1 - 17. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online