Question 2 Methyl orange could be used as indicator in the sodium carbonate-hydrochloric acid standardization reaction. Boiling is not necessary in this case, because methyl orange changes colour from pH 4.4 to pH 3.0 and is therefore not affected by dissolved carbon dioxide. However, despite this advantage, methyl orange is not so suitable as methyl red. Consider the table below for titration of 25 mL of HCI. 24.90 24.95 Amount of HCI added (mL) 24.50 pH Amount of HCI added (mL) | 25.02 pH 24.80 24.98 25.00 11.0 10.6 10.3 10.0 9.6 7.0 25.05 25.10 25.20 25.50 26.00 4.4 4.0 3.7 3.4 3.0 2.7 Suggest a reason why methyl orange is not suitable as an indicator and calculate the "indicator error" involved.

Question 2 Methyl orange could be used as indicator in the sodium carbonate-hydrochloric acid standardization reaction. Boiling is not necessary in this case, because methyl orange changes colour from pH 4.4 to pH 3.0 and is therefore not affected by dissolved carbon dioxide. However, despite this advantage, methyl orange is not so suitable as methyl red. Consider the table below for titration of 25 mL of HCI. 24.90 24.95 Amount of HCI added (mL) 24.50 pH Amount of HCI added (mL) | 25.02 pH 24.80 24.98 25.00 11.0 10.6 10.3 10.0 9.6 7.0 25.05 25.10 25.20 25.50 26.00 4.4 4.0 3.7 3.4 3.0 2.7 Suggest a reason why methyl orange is not suitable as an indicator and calculate the "indicator error" involved.

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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