Chemistry 12th Edition

Published by McGraw-Hill Education
ISBN 10: 0078021510
ISBN 13: 978-0-07802-151-0

Chapter 15 - Acids and Bases - Questions & Problems - Page 710: 15.12


The pH is the negative logarithm of the $H^+$ concentration: $pH = -log[H^+]$. The pH value is easier to represent, compared with the concentration in $M$.

Work Step by Step

The pH is easier to represent, because the logarithmic scale is capable of representing very small numbers by simple numbers, for example: The concentration values between 1 and $10^{-14}$ $M$ can be represented by pH with values between 0 and 14.
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