pH

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 16.85QE

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Question

Bromoscresol green, K_a = 2.0 x 10^-5 is yellow in its protonated form (HX) and blue in its ionized form (X^-). At what pH will bromoscresol green be a perfect green colour?

Express your answer to one decimal place.

Methyl Red Indicator
4
pH
2
8
10
[HX] >> [x-1
[HX] = [X-]
[HX] << [X-]

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