1 / 7

Oxidation and Reduction!

Oxidation and Reduction!. Aka: Redox. Oxidation and Reduction is the concept that helps us understand how/why elements gain/ lose electrons An important Mnemonic is: LEO says GER Lose electrons= oxidation, Gain electrons = Reduction ( OilRig …) idonlike.

indira-mays
Download Presentation

Oxidation and Reduction!

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 and Reduction! Aka: Redox

  2. Oxidation and Reduction is the concept that helps us understand how/why elements gain/ lose electrons • An important Mnemonic is: • LEO says GER • Lose electrons= oxidation, Gain electrons = Reduction (OilRig…) idonlike

  3. Oxidation state/number • The oxidation number of an element is *kind of like the charge. • We have learned that certain elements always have “a” charge! • Well… Guess What!!!! (That’s a Bingo!!!) • Sometimes the charges of elements can change, and/or be different from what we expected. ( yes… that IS exciting!!!)

  4. Oxidation numbers of elements: Oxidation Rules: 1 - oxidation state of a free ( single) element (or diatomic molecule) is 0 Na0, Fe0, N20, etc. 2 - oxidation number of a monatomic cation is same as its charge ( group 1, 2 metals in particular!) +1, +2 3 – normal oxidation number of Hydrogen is +1 but… H -1 in metal hydrides NaH, MgH2,

  5. 4 – oxygen is usually -2, but in peroxides it is -1 Na2O, MgO, H2O, Na2O2, MgO2,H2O2, 5 – a lot of elements- especially transition metals and most of the non metals can have lots o’ different oxidation numbers And that sounds fascinating … doesn’t it? (yes!)

  6. *The sum of all oxidation numbers in a compound will = 0 , kinda like what we have been doing with ionic compounds ( examples!) And : NO, NO2,N2O5, etc…. The sum of all oxidation numbers in a polyatomic ion will be the charge of the P.A. ion (examples)…

  7. Examples: Some, like transition metal ionic compounds you can do! Examples: Molecular compounds we have to figure out, based on rules. ( examples…) Polyatomic ions… we have to figure out based on rules… (examples)

More Related