Tuesday, April 27, 2010

4-27-10

hey wassup everybody here's what we did in class today and feel free to comment on anything I left out.

Indicators & pH meters

1. Transition interval
  • the pit range over which an indicator changes color
  • Indicators that change color at pH lower than 7 are stronger acids than other types of indicators
  • Ionizes more than the others
  • Indicators that undergo transition in higher pH range are weaker acids
2. pH meter
  • determines the pH of a solution by measuring the voltage between the two electrodes that are placed in the solution
  • voltage change as water ion concentration in the solution changes
  • measures pH more precisely than indicators
3. Titration
  • controlled addition and measurement of the amount of a solution of known concentration required to react completely with a measured amount of a solution of unknown concentration

Remember to finish up your pre-lab if you did

have a good night
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16 comments:

  1. Patrick BloseApril 27, 2010 at 5:54 PM

    good website on titration

    http://www.mpcfaculty.net/mark_bishop/titration.htm

    ReplyDelete
  2. Matt OriansApril 27, 2010 at 5:54 PM

    GREAT JOB GLENNJAMIN!!

    here's a good website with more information on pH meters:

    http://www.ph-meter.info/

    ReplyDelete
  3. Will LongApril 27, 2010 at 6:27 PM

    This is a good site on titration.

    http://www.dartmouth.edu/~chemlab/techniques/titration.html

    ReplyDelete
  4. Donnie SheaApril 27, 2010 at 7:12 PM

    Great blog Glenn. Anywho, here's a site on titration:
    http://chemistry.about.com/od/acidsbases/a/aa082304a.htm

    ReplyDelete
  5. Andrew ParmenterApril 27, 2010 at 7:17 PM

    heres a good site on titration

    http://www.files.chem.vt.edu/chem-ed/titration/titratn.html

    ReplyDelete
  6. H.HillApril 27, 2010 at 7:23 PM

    Here is a site with examples of titration calculations. You might want to look at it because we're having a, y'know, lab about titration...

    http://www.webchem.net/notes/Periodicity/titration_calcs.htm

    ReplyDelete
  7. Ryan DiazApril 27, 2010 at 7:24 PM

    here's a site on pH ranges

    http://biomedx.com/pH/page3.html

    ReplyDelete
  8. Jim AlrutzApril 27, 2010 at 7:27 PM

    Want to make your own pH indicator? This link tells you how.

    http://chemistry.about.com/od/acidsbase1/a/red-cabbage-ph-indicator.htm

    ReplyDelete
  9. Patrick SweeneyApril 27, 2010 at 7:53 PM

    This is a website with another PH chart.

    http://staff.jccc.net/pdecell/chemistry/phscale.html

    ReplyDelete
  10. DuklewskiApril 28, 2010 at 3:53 AM

    Khan Academy on Titration:
    http://khanexercises.appspot.com/video?v=BBIGR0RAMtY

    ReplyDelete
  11. matt johnsonApril 28, 2010 at 5:00 AM

    good site on titration with a titration lab
    http://www.dartmouth.edu/~chemlab/techniques/titration.html

    ReplyDelete
  12. Justin ScheunerApril 28, 2010 at 6:21 AM

    here is a website on the ph scale
    staff.jccc.net/pdecell/chemistry/phscale.html

    ReplyDelete
  13. Peter WetzelApril 28, 2010 at 7:11 AM

    Here is an excellent site on Titration:

    www.sigmaaldrich.com/analytical-chromatography/titration.html

    ReplyDelete
  14. Colby "Girlfraand" MabryApril 28, 2010 at 7:12 PM

    http://www.mpcfaculty.net/mark_bishop/titration.htm

    good website on titration.

    ReplyDelete
  15. Will BrantleyApril 30, 2010 at 5:35 AM

    This a site on titration:
    http://www.dartmouth.edu/~chemlab/techniques/titration.html

    ReplyDelete
  16. Chris MathewsMay 11, 2010 at 8:30 PM

    good website on titrations

    http://www.files.chem.vt.edu/chem-ed/titration/titratn.html

    ReplyDelete

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