1 / 8

Outline: 4/2/07

Outline: 4/2/07. Dr. Peaslee away today – back Wed. 5 CAPA sets remain! 4 weeks of classes remain! 3 chem seminars remain!. Today: Continue Chapter 19. Balancing redox reactions. Example.

brittany-price
Télécharger la présentation

Outline: 4/2/07

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Outline: 4/2/07 • Dr. Peaslee away today – back Wed. • 5 CAPA sets remain! • 4 weeks of classes remain! • 3 chem seminars remain! Today: Continue Chapter 19 • Balancing redox reactions

  2. Example Separate the following unbalanced redox processes into half-reactions. All occur in aqueous solution: • Cr2O72-(aq) + Fe2+(aq) Cr2+(aq) + Fe3+(aq) • H2O2(aq) + SO3-+(aq) SO42-(aq) • BrO2-(aq) BrO3-(aq) + Br-(aq)

  3. 0 Balancing REDOX Reactions • Example 1: Acidic conditions MnO4- + Br- Mn2+ + Br2 • Example 2: Basic conditions MnO4- + SO3- MnO42- + SO42-

  4.  2  5 5 e- +8 H+ + MnO4- Mn2++ 4 H2O MnO4- Mn2+ MnO4- Mn2+ + 4 H2O 8 H+ + • Example 1: Acidic conditions Br- Br2 2 Br- Br2 2 Br- Br2 + 2 e- Now, combine half-reactions 16 H+ + 2 MnO4- + 10 Br-  2 Mn2+ + 8 H2O + 5 Br2

  5. MnO4- MnO42- e- +  2 • Example 2: Basic conditions 2 OH- +H2O + SO32- SO42-+ 2 H2O 2 OH- +H2O + SO32- SO42-+ 2 H2O+2e- SO32- SO42- H2O + SO32- SO42- H2O + SO32- SO42-+ 2 H+ Now, combine half-reactions 2 OH- + 2 MnO4- + SO3- 2 MnO42- + SO42- + H2O

  6. Worksheet #11

More Related