Chemistry 9th Edition

Published by Cengage Learning
ISBN 10: 1133611095
ISBN 13: 978-1-13361-109-7

Chapter 14 - Acids and Bases - Exercises: 47

Answer

a. The autoionization of water is endothermic. b. $[H^+]=[OH^-]=2.34*10^{-7}\text{ M}$

Work Step by Step

a. Because the reaction favors the right as we increase the temperature, the autoionization of water is endothermic. b. $[H^+]=[OH^-]=x$ in a neutral solution. Therefore, $[H^+][OH^-]=5.47*10^{-14}$ $x^2=5.47*10^{-14}$ $x=2.34*10^{-7}\text{ M}$ and ... $[H^+]=[OH^-]=2.34*10^{-7}\text{ M}$
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