{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

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

Info icon This preview shows pages 1–19. Sign up to view the full content.

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

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

View Full Document Right Arrow Icon
Fred Diehl – Univ. of Virginia Fred
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
Image of page 3

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

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

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

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

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

View Full Document Right Arrow Icon
Amphipathic Molecules
Image of page 8
Micelle Formation
Image of page 9

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

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

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

View Full Document Right Arrow Icon
Definition of pH pH = -log [H + ] = log (1/H + )
Image of page 12
pH Scale
Image of page 13

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

View Full Document Right Arrow Icon
Dissociation of Strong Electrolytes Example: HCl
Image of page 14
Dissociation of Weak Electrolytes Example: Acetic Acid
Image of page 15

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

View Full Document Right Arrow Icon
Henderson-Hasselbalch Equation pH = pK + log ([A - ]/[HA])
Image of page 16
Titration of Acetic Acid
Image of page 17

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

View Full Document Right Arrow Icon
Titration of Weak Electrolytes
Image of page 18
Image of page 19
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}