Chemistry: Molecular Approach (4th Edition)

Published by Pearson
ISBN 10: 0134112830
ISBN 13: 978-0-13411-283-1

Chapter 16 - Exercises - Page 771: 13


The value of $K_w$ at $25^o C$ is $1.0 \times 10^{-14}$.

Work Step by Step

The equations for the autoionization of water and the expression for the ion product constant are in page 732, Section 16.5 The value of the constant at $25 ^{o}C$ is on the same section, in page 733. $$H_2O(l) + H_2O(l) \leftrightharpoons H_3O^+(aq) + OH^-(aq)$$ or $$H_2O(l) \leftrightharpoons H^+(aq) + OH^-(aq)$$ $$K_w = [H_3O^+][OH^-]$$ or $$K_w = [H^+][OH^-]$$ The value of $K_w$ at $25^o C$ is $1.0 \times 10^{-14}$.
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