Tuesday, December 1, 2009

Tuesday December 1, 2009

Tuesday December 1, 2009
For the first part of class today, we played bingo. Then we took a couple of notes:

We first did the example problem on the book on page 233-234. You can look for yourself for the work and the answers. The text does a good job at explaining it so you might wanna take a look at that.

USING OXIDATION NUMBERS FOR FORMULA AND NAMES
- Many nonmetals can have more than one oxidation number.
- These numbers can sometimes be used in the same manner as ionic charges to determine formulas.
- Suppose, for example, you want to know the formula of a binary compound formed between sulfur and oxygen. From the Common +4 and +6 oxidation states of sulfur, you could expect the sulfur might form SO2 or SO3. Both are know compounds.
- Using oxidation numbers, the Stock System, introduced in the previous section for naming ionic compounds, can be used as an alternative to the prefix system fir naming binary molecular compounds.
- An example of this is shown on page 235.

SECTION 3
- A chemical formula indicates:
- The elements present in the compound
- The relative number of atoms or ions of each element present in a compound
- Chemical formulas also allows chemists to calculate a number of characteristic values for a given compound.
FORMULA MASS
- The formula mass of any molecule, formula unit, or ion is the sum of the average atomic masses of all atoms represented in its formula.


That was it for today. Don't forget about the quiz tomorrow on table 1 and 2 and also some more info on the Chapter.
See ya






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14 comments:

  1. Griff MoranDecember 1, 2009 at 5:00 PM

    http://chemistry.about.com/od/generalchemistry/a/oxidationno.htm

    Lists set of rules for oxidation

    ReplyDelete
  2. Glennjamin AdesojiDecember 1, 2009 at 5:03 PM

    http://chemistry.about.com/od/generalchemistry/a/oxidationno.htm

    rules for oxidation

    ReplyDelete
  3. Justin ScheunerDecember 1, 2009 at 5:10 PM

    lists the rules for assigning oxidation states/numbers
    www.seas.upenn.edu/~chem101/oxidationstates.html

    ReplyDelete
  4. joe "kitty" krebsDecember 1, 2009 at 5:19 PM

    http://www.fordhamprep.org/gcurran/sho/sho/lessons/lesson52.htm

    basically all you need to know about oxidation numbers.
    good luck on the quiz tomorrow everyone!

    ReplyDelete
  5. Jacob PoseyDecember 1, 2009 at 5:23 PM

    http://www.digipac.ca/chemical/molemass/moles6.htm


    formula mass

    ReplyDelete
  6. Ryan DiazDecember 1, 2009 at 5:32 PM

    http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch2/oxnumb.html

    talks about oxidation numbers

    ReplyDelete
  7. Alex BlandDecember 1, 2009 at 6:36 PM

    This website explains oxidation.

    http://www.files.chem.vt.edu/RVGS/ACT/notes/oxidation_numbers.html

    ReplyDelete
  8. Patrick BloseDecember 1, 2009 at 6:53 PM

    Good website on chemical formulas

    http://en.wikipedia.org/wiki/Chemical_formula

    ReplyDelete
  9. Matt FarrellDecember 1, 2009 at 6:57 PM

    http://www.occc.edu/kmbailey/chem1115tutorials/oxidation_numbers.htm

    good overview of oxidation numbers

    ReplyDelete
  10. Taylor AdkinsDecember 1, 2009 at 8:19 PM

    Oxidation Numbers:http://www.green-planet-solar-energy.com/oxidation-number-rules.html

    ReplyDelete
  11. matt johnsonDecember 1, 2009 at 8:24 PM

    pretty good site for oxidation numbers and other things
    http://genchem.chem.wisc.edu/sstutorial/Text6/Tx62/tx62.html

    ReplyDelete
  12. Patrick SweeneyDecember 2, 2009 at 5:20 AM

    Good blog on formula mass vs. molecular mass.


    http://chemistry.about.com/b/2009/04/27/formula-mass-versus-molecular-mass.htm

    ReplyDelete
  13. DuklewskiDecember 2, 2009 at 5:44 AM

    http://www.sciencegeek.net/Chemistry/taters/EquationProducts.htm
    review for the quiz tomorrow

    ReplyDelete
  14. H.HillDecember 2, 2009 at 6:06 AM

    This site has problems for formula mass

    http://www.fordhamprep.org/gcurran/sho/sho/lessons/lesson56.htm

    ReplyDelete

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