Lecture 33 11/28/05 1 seminar left  Urban sprawl  Today at 4 No lab report will be due on Tuesday, November 29  For this week only, you can skip all.

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Presentation transcript:

Lecture 33 11/28/05 1 seminar left  Urban sprawl  Today at 4 No lab report will be due on Tuesday, November 29  For this week only, you can skip all the data analysis. Spectroscopy  Some interesting applications

Scatchard Plot To get equilibrium constant P + X ⇄ PX Plot ΔA/[X] vs. ΔA Two cases  K small  K large

Job’s Plot Method of continuous variation Way to determine the formula of a complex ion P + X  ?????

Plot: Absorbance vs. mole fraction X-axis

Enzyme-Linked Immunosorbent Assay (ELISA)

Time-resolved Fluorescence Immunoassay

Microtox/Deltatox

Chromatography

Extraction Partition coefficient:

After 1 extraction After n extractions

Solute A has a partition coefficient of 3 between toluene and water. Which is a more efficient extraction of a 100- mL M aqueous solution:  One extraction with 500-mL toluene  Five extractions each with100-mL toluene

Distribution coefficient