oxidation and reduction n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Oxidation and Reduction! PowerPoint Presentation
Download Presentation
Oxidation and Reduction!

Loading in 2 Seconds...

play fullscreen
1 / 7

Oxidation and Reduction! - PowerPoint PPT Presentation


  • 91 Views
  • Uploaded on

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.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Oxidation and Reduction!' - chanel


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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide2

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
oxidation state number
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!!!)
oxidation numbers of elements
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,

slide5

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!)

slide6

*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)…

examples
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)