The titration curve as shown is for the titration of 25.00 mL of 0.100 M CH3CO2H with 0.100 M NaOH. The reaction can be represented as: CH3 CO2 H + OH− ⟶ CH3 CO2− + H2 O(a) What is the initial pH before any amount of the NaOH solution has been added? Ka = 1.8 × 10−5 for CH3CO2H.(b) Find the pH after 25.00 mL of the NaOH solution have been added.(c) Find the pH after 12.50 mL of the NaOH solution has been added.(d) Find the pH after 37.50 mL of the NaOH solution has been added. 14-13Titration of weak acid CH,COOH12Equivalencepoint pH, 8.7210Phenolphthalein[pH rangeEquivalencepoint pH, 7.00Litmus pH range6.Methyl orange[pH range43Titration of strong acid HCI1 -101520253035404550Volume of 0.100 M NaOH added (mL)Figure 14.23 The graph shows a titration curve for the titration of 25.00 mL of 0.100 M CH3CO,H (weak acid) with0.100 M NaOH (strong base) and the titration curve for the titration of HCI (strong acid) with NaOH (strong base). ThepH ranges for the color change of phenolphthalein, litmus, and methyl orange are indicated by the shaded areas.11Hd

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Answered: 14- 13 Titration of weak acid CH,COOH…

Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter16: Reactions Between Acids And Bases

Section: Chapter Questions

Problem 16.58QE

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Question

The titration curve as shown is for the titration of 25.00 mL of 0.100 M CH₃CO₂H with 0.100 M NaOH. The reaction can be represented as:
CH₃ CO₂ H + OH⁻ ⟶ CH₃ CO₂⁻ + H₂ O
(a) What is the initial pH before any amount of the NaOH solution has been added? K_a = 1.8 × 10⁻⁵ for CH₃CO₂H.

(b) Find the pH after 25.00 mL of the NaOH solution have been added.
(c) Find the pH after 12.50 mL of the NaOH solution has been added.
(d) Find the pH after 37.50 mL of the NaOH solution has been added.

14-
13
Titration of weak acid CH,COOH
12
Equivalence
point pH, 8.72
10
Phenolphthalein
[pH range
Equivalence
point pH, 7.00
Litmus pH range
6.
Methyl orange
[pH range
4
3
Titration of strong acid HCI
1 -
10
15
20
25
30
35
40
45
50
Volume of 0.100 M NaOH added (mL)
Figure 14.23 The graph shows a titration curve for the titration of 25.00 mL of 0.100 M CH3CO,H (weak acid) with
0.100 M NaOH (strong base) and the titration curve for the titration of HCI (strong acid) with NaOH (strong base). The
pH ranges for the color change of phenolphthalein, litmus, and methyl orange are indicated by the shaded areas.
11
Hd

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