Chem_208_17_07_web

Chem_208_17_07_web - Today: Ch 17.3 (Indicators),...

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1 Today: Ch 17.3 (Indicators), 17.4(Titrations) PS7 due Fri. March 30 NOTE: PKa = 9.3 for phenolphthalein
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2 Cornell Computer Reuse Association Our mission is to acquire and recycle computer equipment from the Cornell community, restore it, and find locations where it will be appropriately used and maintained to further educational opportunities of those who otherwise would not have access to this technology. We are seeking volunteers to help raise awareness of this association and fundraise for the shipping fees of these computers. Interested in becoming a member? Contact Anthony at [email protected] or Angela at [email protected] . Thanks!
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3 Indicators - a weak acid with a conjugate base of different color HIn + H 2 O H 3 O + + In - ] HIn [ ] In ][ O H [ K 3 a + = Color 1 Color 2 Phenophthalein : HIn: Colorless In - :P i n k Basic- Small [H 3 O + ] Acidic- Large [H 3 O + ] 1 ] HIn [ ] In [ >> 1 ] HIn [ ] In [ << [In - ] << [HIn] Colorless [In - ] >> [HIn] Pink ] HIn [ ] In [ ] O H [ K 3 a + = 1 ] O H [ K 3 a << + 1 ] O H [ K 3 a >> +
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4 HIn + H 2 O H 3 O + + In - ] HIn [ ] In ][ O H [ K 3 HIn + = ] HIn [ ] In [
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This note was uploaded on 05/18/2008 for the course CHEM 2080 taught by Professor Davis,f during the Spring '07 term at Cornell.

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Chem_208_17_07_web - Today: Ch 17.3 (Indicators),...

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