Chemistry (7th Edition)

Published by Pearson
ISBN 10: 0321943171
ISBN 13: 978-0-32194-317-0

Chapter 15 - Aqueous Equilibria: Acids and Bases - Worked Example - Page 615: 9

Answer

$[OH^-] = 7.143 \times 10^{- 11}M$ The solution is acidic.

Work Step by Step

$[H_3O^+] * [OH^-] = Kw = 10^{-14}$ $ 1.4 \times 10^{- 4} * [OH^-] = 10^{-14}$ $[OH^-] = \frac{10^{-14}}{ 1.4 \times 10^{- 4}}$ $[OH^-] = 7.143 \times 10^{- 11}M$ Since: $[H_3O^+] > [OH^-]$, the solution is acidic.
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