The transition in color for phenol red is 6.8 – 8.4 while that of phenolphthalein is from 8.3 to 10.0. On the titration curve, indicate the pH range where the transition occurs for both indicators. Explain briefly which is better to use as indicator for the reaction between a strong acid and a strong base.
The transition in color for phenol red is 6.8 – 8.4 while that of phenolphthalein is from 8.3 to 10.0. On the titration curve, indicate the pH range where the transition occurs for both indicators. Explain briefly which is better to use as indicator for the reaction between a strong acid and a strong base.
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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The transition in color for phenol red is 6.8 – 8.4 while that of phenolphthalein is from 8.3 to 10.0. On the titration curve, indicate the pH range where the transition occurs for both indicators. Explain briefly which is better to use as indicator for the reaction between a strong acid and a strong base.
Transcribed Image Text:The titration reaction between a strong acid and a strong base is monitored by measuring the pH of the
titration mixture after each addition of 1.00 mL of the titrant. A 25.00 mL solution of a strong acid was
titrated with 0.1020 M NAOH solution. The titration curve is given below:
Titration Curve: Strong Acid-Strong Bas e Reaction
14.00
2.00
0.00
8.00
6.00
4.00
2.00
0.00
0.00
5.00
0.00
15.00
20.00
2500
30.00
3500
Volume (mL) N2OH
From the titration curve, show how the equivalence point is determined.
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