Chapter 15 Lecture 4

Chapter 15 Lecture 4 - a. Before titrant is added. b. mL...

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Chapter 15 Lecture 4 Indicators are weak acids The protonated form has a different color Than the unprotonated form HIn + H 2 O H 3 O + + In Clear Pink pH< 8 pH > 10 Just one drop pH is [H 3 O + ] is determined by the solution When pH changes: Indicator changes color Used in titrations:
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Acid Base Titrations: The experiment: Titration of a weak acid with a strong base 50 mL of 0.03M acetic acid titrated with 0.06 M NaOH Draw the pH of in the titration beaker vs mL of base added. Directions: 1. Write the chemical reaction occurring in the beaker 2. Calculate the equivalence point volume 3. Calculate the pH in the titration beaker at 4 points.
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Unformatted text preview: a. Before titrant is added. b. mL greater than zero, but less than equivalence point volume c. At the equivalence point volume d. after the equivalence point volume 4. Construct a curve showing pH vs mL titrant added. 2. Calculate equivalence point volume Hey this is stoichiometry 3a. Weak acid in water (go look up Ka) 3b. Before equivalence point. Cheat This is a buffer, use Henderson-Hasselbalch 3c. At the equivalence point notice that all that is in solution is the conjugate base 3d. After the equivalence point it is just a dilution problem....
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Chapter 15 Lecture 4 - a. Before titrant is added. b. mL...

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