Chapter+10+Acid-Base+Titrations+Skeleton+Notes

Chapter+10+Acid-Base+Titrations+Skeleton+Notes - Chapter...

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Chapter 10: Acid-Base Titrations I. Steps in solving a titration problem. A. Calculate the volume of titrant required to reach the equivalence point. B. Identify where you are in the titration (equivalence point, beyond the equivalence point, before the equivalence point). C. Write out the chemical reaction (weak acid equilibrium, weak base equilibrium, titration reaction) for the given region. D. Solve the problem. II. What happens throughout a titration of a weak acid (HA) with a strong base (OH - )? A. Region 1 (V OH- added = 0 mL): Have a Weak Acid (HA). Weak Acid Equilibrium: HA + H 2 O A - + H 3 O + [HA] ] H ][ [A = K + - a F – x + x + x x - F x = K OR F K = ] [H a 2 a a a approx + B. Region 2: Buffer Region (HA and A - ) pH V OH - (mL) Region 1 Region 2 Region 3 Region 4
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V 0 mL < V OH- added < V eq Titration Reaction: HA + OH - A - + H 2 O K = 1/K b [HA] ] [A Log pK pH a - + = C. Region 3: Equivalence Point; Have a Weak Base (A - ) . moles of Analyte (HA) = moles of Titrant (OH
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This note was uploaded on 12/06/2011 for the course CHEM 241 taught by Professor Tiani during the Fall '08 term at UNC.

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Chapter+10+Acid-Base+Titrations+Skeleton+Notes - Chapter...

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