## Chemistry: The Molecular Science (5th Edition)

Published by Cengage Learning

# Chapter 14 - Acids and Bases - Questions for Review and Thought - Topical Questions - Page 652c: 46b

#### Answer

$0.10M$ $K_2S$ is more basic.

#### Work Step by Step

** You can find the $K_b$ values on table: 14.2 (Page 624) Since both solutions have the same concentration, we just have to determine which compound is more basic: -$K_2S$: It is a salt formed by $2K^+$ and $S^{2-}$. $K^+$ has negligible acidity, so, we don't need to consider it. $S^{2-}$ is a strong base with $K_b = 1 \times 10^{5}$ - $K_3PO_4$: It is a salt formed by $3K^+$ and $P{O_4}^{3-}$. $K^+$ has negligible acidity, so, we don't need to consider it. $P{O_4}^{3-}$ is a base with $K_b = 2.2 \times 10^{-2}$ $S^{2-}$ has a greater $K_b$ value, therefore, it is more basic. So, $0.10M$ $K_2S$ is more basic.

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