General, Organic, and Biological Chemistry: Structures of Life (5th Edition)

Published by Pearson
ISBN 10: 0321967461
ISBN 13: 978-0-32196-746-6

Chapter 11 - Acids and Bases - 11.3 Strengths of Acids and Bases - Questions and Problems - Page 411: 11.24

Answer

a. Mostly reactants. b. Mostly reactants. c. Mostly reactants.

Work Step by Step

1. Compare the strengths and identify the weaker and stronger acids and bases. a. $H_3O^+ \gt H_3PO_4$ and $H_2{PO_4}^{2-} \gt H_2O$ $H_3PO_4$ is the weaker acid. $H_2O$ is the weaker base. $H_2P{O_4}^{2-}$ is the stronger base. $H_3O^+$ is the stronger acid. b. $HC{O_3}^- \gt H_2O$ and $OH^- \gt C{O_3}^{2-}$ c. $HF \gt HS^-$ and $S^{2-} \gt F^-$ 2. If the weaker acid and base are on the reactants side, the reaction contains mostly reactants at equilibrium, and vice-versa. a. $H_3PO_4$ and $H_2O$ on reactants: Mostly reactants. b. $H_2O$ and $C{O_3}^{2-}$ on reactants: Mostly reactants. c. $ HS^-$ and $F^-$ on reactants: Mostly reactants.
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