Which one of the following indicators is best suited for titrating 0.05 M methylamine (pK, = 3.19) with 0.05 M HCI? A. Bromophenol blue, pKa = 3.9 B. Methyl red, pKa = 5.0 O C. Phenol red, pK, = 7.9 O D. Bromocresol purple, pKa = 6.3 OE. Alizarin yellow, pK, = 11.2 O O

Which one of the following indicators is best suited for titrating 0.05 M methylamine (pK, = 3.19) with 0.05 M HCI? A. Bromophenol blue, pKa = 3.9 B. Methyl red, pKa = 5.0 O C. Phenol red, pK, = 7.9 O D. Bromocresol purple, pKa = 6.3 OE. Alizarin yellow, pK, = 11.2 O O

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter15: Complex Ion And Precipitation Equilibria

Section: Chapter Questions

Problem 68QAP

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Precipitation Titration

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Which one of the following indicators is best suited for titrating 0.05 M methylamine (pK, = 3.19) with 0.05 M HCI?
A. Bromophenol blue, pKa = 3.9
B. Methyl red, pKa = 5.0
C. Phenol red, pKa = 7.9
D. Bromocresol purple, pKa = 6.3
E. Alizarin yellow, pKa = 11.2

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