Titration Experiment Preview by Jennifer Klein-Wackerla

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Titration Experiment Previewby Jennifer
Klein-Wackerla

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Titration Experiment Preview

• This is a preview of the titration experiment we
  will be doing in class.
• Look through the following slides to get familiar
  with the setup of the lab.
• If necessary, print off the slides for a guide
  while performing the experiment.

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Titration Experiment Preview

• A ring stand, a clamp, a burette, a 250mL flask,
  a funnel, and a white sheet of paper are required
  materials
• The materials should be assembled as the picture
  shows.

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Titration Experiment Preview

• Using the funnel at the top, fill the burette
  with the HCl solution.
• Be sure the stopcock of the burette is closed!
• In the flask place the weighed TRIS, the
  distilled water, and 5 drops of the indicator.

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Titration Experiment Preview

• Begin the titration by opening the stopcock to
  make the HCl solution flow dropwise into the
  flask.
• Be sure to swirl the flask constantly so the
  solutions mix thoroughly.

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Titration Experiment Preview

• Continue to add HCl solution to the flask until a
  color change begins (blue to green)
• At this point, slow the flow even more. You
  actually want the solution to be more green than
  yellow (over titrated shown.)

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Titration Experiment Preview

• This titration went past the equivalence point.
  The color should have been more greenish-yellow.
• If you get a solution as yellow as the one shown,
  you must redo the titration.