diss const of weak acid - Kris Kelly Dissociation Constant...

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Kris Kelly Dissociation Constant Lab CHEM 122L 3/24.2008 Introduction/Background: The purpose of this experiment is to determine the dissociation constant of a weak acid. This is determinable through a slow titration of a base into the weak acid, and reading the pH after each addition. Titration is the process of gradual introduction of one substance into another using a burette. The pH is found easily by using a pH meter and having its electrodes in contact with as much of the solution as possible for an accurate reading. Key Data: See attached pages for data 25.0 ml Unknown acid A Sample Calculations: Trial 1 Volume of NaOH used at equivalence point: In order to determine the volume of NaOH used at the equivalence point, a vertical line must be drawn from appoint in the center of the sharp increase in the graph. Volume of NaOH used at half the equivalence point: As with the determination of the volume at the equivalence point, the volume determination for half that is also graphically determined.
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diss const of weak acid - Kris Kelly Dissociation Constant...

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