## Chemistry 10th Edition

Published by Brooks/Cole Publishing Co.

# Chapter 18 - Ionic Equilibria I: Acids and Bases - Exercises - Mixed Exercises - Page 746: 97

#### Answer

a) Basic. b) Acidic. c) Essentially neutral. d) Basic.

#### Work Step by Step

a) $Na_2SO_4$: Strong base $(NaOH)$ and weak acid $(HS{O_4}^-)$: Basic solution. b) $NH_4Cl$: Weak base $(NH_3)$ and strong acid $(HCl)$: Acidic solution. c) $KCl$: Strong base $(KOH)$ and strong acid $(HCl)$: Neutral solution. d) $NH_4CN$: Weak base $(NH_3)$ and weak acid: $(HCN)$: We need to compare the constants values: $K_b (NH_3) > K_a ( HCN)$: Therefore: Basic solution.

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