Answer
The pH of this solution is 2.4.
Work Step by Step
The pH of a solution is the negative Log of the concentration of H3O+ in the solution. Simply take the Log of the given concentration of H3O+ and make the result positive.
pH = -Log[.0042]
Chemistry: An Introduction to General, Organic, and Biological Chemistry (12th Edition)
by Timberlake, Karen C.
Published by
Prentice Hall
ISBN 10:
0321908449
ISBN 13:
978-0-32190-844-5
Chapter 10 - Section 10.7 - Buffers - Additional Questions and Problems - Page 357: 10.74b
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