L4 - and its conjugated base? 13 Henderson-Hasselbalch...

Info iconThis preview shows pages 1–22. Sign up to view the full content.

View Full Document Right Arrow Icon
1 are determined by the total concentration of solutes Colligative properties
Background image of page 1

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

View Full DocumentRight Arrow Icon
2 Osmosis Osmotic pressure — the pressure that must be applied to prevent water from Fowing in Osmosis is movement of water through a semi-permeable membrane from high to low concentration Know this de±nition:
Background image of page 2
3 Osmotic pressure
Background image of page 3

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

View Full DocumentRight Arrow Icon
4 Dialysis
Background image of page 4
5 Ionization of water H 2 0 H + + OH K = H + [ ] OH [ ] H 2 O [ ] K H 2 O [ ] = K w = H + [ ] OH [ ] K w = H + [ ] OH [ ] = 10 14 M 2
Background image of page 5

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

View Full DocumentRight Arrow Icon
6 In pure water [H + ] = [OH - ]= 10 -7 M [H + ] >10 -7 M: acidic pH = -log [H + ] [H + ] < 10 -7 M : basic pOH = -log [OH - ] K w = [H + ] x [OH - ] = 10 -14 M 2 pH + pOH = 14
Background image of page 6
7 Acid-Base Chemistry An acid can donate a proton A base can absorb a proton Conjugated base Conjugated acid HA + H 2 O H 3 O + + A -
Background image of page 7

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

View Full DocumentRight Arrow Icon
8 Strength of an acid refers to its tendency to dissociate K = H 3 O + [ ] A [ ] HA [ ] H 2 O [ ] K a = K H 2 O [ ] = H 3 O + [ ] A [ ] HA [ ] p K a = log K a
Background image of page 8
9
Background image of page 9

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

View Full DocumentRight Arrow Icon
10 Calculating the pH • Strong acid • Mixture of a weak acid and its conjugated base
Background image of page 10
11 Strong acids dissociate almost completely in water 0.2 M HCl H + [ ] = 0.2 M pH = - log 0.2 = 0.7
Background image of page 11

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

View Full DocumentRight Arrow Icon
12 pH of a solution containing a weak acid
Background image of page 12
Background image of page 13

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

View Full DocumentRight Arrow Icon
Background image of page 14
Background image of page 15

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

View Full DocumentRight Arrow Icon
Background image of page 16
Background image of page 17

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

View Full DocumentRight Arrow Icon
Background image of page 18
Background image of page 19

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

View Full DocumentRight Arrow Icon
Background image of page 20
Background image of page 21

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

View Full DocumentRight Arrow Icon
Background image of page 22
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: and its conjugated base? 13 Henderson-Hasselbalch equation K = H + [ ] A [ ] HA [ ] H + [ ] = K HA [ ] A [ ] log H + [ ] = log K HA [ ] A [ ] pH = pKa +log A-[ ] HA [ ] 14 Titration pH = pKa +log A-[ ] HA [ ] 15 Buffers Buffers are solutions that resist change in pH Structure and activity of biological molecules is affected by the pH 16 Mixture of a weak acid and its conjugated base resist change in pH Buffer capacity is highest at the pKa Buffers work within 1 pH unit of the pKa Buffers 17 3. Nucleotides and Nucleic acids 18 Nucleotides 1. N-containing base 2. A sugar 3. One or more phosphate groups 19 Nitrogen containing bases: Purines and pyrimidines 20 Bases are derivatives of purine or pyrimidine 21 Nucleosides No phosphates 22 Nucleotides One or more phosphate groups...
View Full Document

This note was uploaded on 05/07/2011 for the course CHEM 365 taught by Professor Huxford during the Spring '08 term at San Diego State.

Page1 / 22

L4 - and its conjugated base? 13 Henderson-Hasselbalch...

This preview shows document pages 1 - 22. Sign up to view the full document.

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