1 / 11

OXIDATION NUMBERS

OXIDATION NUMBERS. What is an oxidation number?. An oxidation number is the charge that an atom in a compound would have if the electron pairs in the bond belonged solely to the more electronegative atom. General Guidelines. The oxidation # of an atom in its pure

triage
Download Presentation

OXIDATION NUMBERS

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. OXIDATION NUMBERS

  2. What is an oxidation number? • An oxidation number is the charge that an atom in a compound would have if the electron pairs in the bond belonged solely to the more electronegative atom.

  3. General Guidelines • The oxidation # of an atom in its pure form, such as Na or Fe, or in a molecule of that element only, such as O2 or P4, is ZERO.

  4. The oxidation # of a monatomic ion is the charge on the ion. ex. Ca2+ is +2

  5. a) O = -2 except in H2O2 (-1) b) H = +1 except in metal hydride, ex. LiH (-1) c) Group IA = +1 d) Group IIA = +2 e) Halides = -1

  6. Use charges on polyatomic ion as indicator, examples: SO42- , NO3- The algebraic sum of the positive & negative oxidation #’s of the atoms in a polyatomic ion is equal to the charge on the ion.

  7. SO42- example:

  8. The sum of the positive & negative oxidation #’s in a neutral compound is zero. example: K2Cr2O7

  9. Examples • What is the single oxidation number of manganese (Mn) in: • MnO2 • Mn2O7 • MnO42- • KMnO4

  10. Determine the single oxidation # of the underlined atom in each of the following species: • CrO42- • P4O10 • Fe3O4 • S2O32-

  11. Practice Sheet

More Related