Explanation a) KOH millimoles = 0 x 0.2 = 0 Propionic acid millimoles = 30 x 0.165 = 4.95 A c i d m i l l i m o l e s - B a s e m i l l i m o l e s 4 .95 − 0 = 4.95 ∴ C o n c e n t r a t i o n o f a c i d = 4.95 30 + 0 = 0 .165 M p H = − log [ 0.165 ] p H = − 0.7825 b) KOH millimoles = 5 x 0.2 = 1 Propionic acid millimoles = 30 x 0.165 = 4.95 A c i d m i l l i m o l e s - B a s e m i l l i m o l e s 4 .95 − 1 = 3 .95 ∴ C o n c e n t r a t i o n o f a c i d = 3.95 30 + 1 = 0 .131 M p H = − log [ 0.131 ] p H = 0.053 c) KOH millimoles = 10 x 0.2 = 2 Propionic acid millimoles = 30 x 0.165 = 4.95 A c i d m i l l i m o l e s - B a s e m i l l i m o l e s 4 .95 − 2 = 2 .95 ∴ C o n c e n t r a t i o n o f a c i d = 2.95 30 + 2 = 2 .098 M p H = − log [ 2.098 ] p H = 0.321 d) For equivalence point The volume to attain m i l l i m o l e s o f b a s e = m i l l i m o l e s o f a c i d ∴ 0.300 x V = 30 x 0.165 V = 35 x 0.165 0.300 V = 19.25 m L KOH millimoles = 19.25 x 0.2 = 3.85 Propionic acid millimoles = 30 x 0.165 = 4.95 A c i d m i l l i m o l e s - B a s e m i l l i m o l e s 4 .95 − 3 .85 = -1 .1 ∴ C o n c e n t r a t i o n o f a c i d = 0...

Pearson eText for Chemistry: structures and Properties -- Instant Access (Pearson+)

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ISBN: 9780136951537

Author: Nivaldo Tro

Publisher: PEARSON+

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.

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Chapter 17, Problem 70E

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To calculate the pH of propionic acid when added base, and to find its equivalence point, one half equivalence point and to sketch its titration curve.

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Chapter 17, Problem 69E

Chapter 17, Problem 71E

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Pearson eText for Chemistry: structures and Properties -- Instant Access (Pearson+)

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To calculate the pH of propionic acid when added base, and to find its equivalence point, one half equivalence point and to sketch its titration curve.

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To determine: To calculate the pH of propionic acid when added base, and to find its equivalence point, one half equivalence point and to sketch its titration curve.

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Chapter 17 Solutions

To determine:

To calculate the pH of propionic acid when added base, and to find its equivalence point, one half equivalence point and to sketch its titration curve.