Portland State University - - Professor Carl C. Wamser
Additions to Chapter 4 & 5 Notes
These sections are now included in the notes, but you may not have
copied them when you originally downloaded the notes for Chapters 4 and
5. This is meant to be a convenient way for you to update your notes.
Balancing Redox Reactions (Chapter 4 Notes)
- identify the two half-reactions
- what gets oxidized, what gets reduced?
- balance all elements except O and H
- balance O
use H2O (in acid) or OH- (in base)
- balance H
use H+ (in acid) or H2O (in base)
- balance charge with electrons (e-)
Fischer Projections (Chapter 5 Notes)
- a method for depicting stereochemistry at a series of chiral centers
- arrange the chiral center so that:
- horizontal groups are forward
- vertical groups are oriented backward
- Note that there are numerous ways to show a given chiral center
- 12 different Fischer projections represent (R)
- 12 different Fischer projections represent (S)