Acid-Base Titration

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Acid-Base Titration

• Titration is a chemical analysis involving the
  addition of a known concentration of titrant to a
  known volume but unknown concentration of sample.
• Acid-Base titration, involves a reaction between
  an acid and base resulting in the production of
  water and a salt (neutralization).
• In a titration, an indicator is used to determine
  the end point of the reaction.
• At the end point, the indicator will change
  colour.
• The equivalence point or stoichiometric point
  occurs when equal moles of hydronium and
  hydroxide ions have been reacted to produce
  water.
• The equivalence point is not always equal to the
  end point and does not always occur at a pH of 7.
• When choosing an indicator for a titration, one
  tries to chose an indicator that will change when
  the equivalence point is reached.

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• Indicators organic molecules with the ability
  to change colour depending upon the pH of a
  solution.
• Titration Between a Strong Acid and Base
• The equivalence point will occur at a pH of 7.
• Want an indicator that will change around 7.
• Titration Between a Weak Acid and Strong Base
• The equivalence point will occur at a pH above
• Want an indicator that will change above 7.
• Titration Between a Strong Acid and Weak Base
• The equivalence point will occur at a pH below 7.
• Want an indicator that will change below7.