1. 1 Chapter 14 Acids and Bases 14.9 Acid-Base Properties of Salt Solutions Copyright © 2008 by Pearson Education, Inc. Publishing as Benjamin Cummings

2. 2 Salts that Form Neutral Solutions A salt solution containing the ions of a strong acid and a strong base Is a neutral solution. Does not produce or attract H + from water. Example: KNO 3 forms a neutral solution because it contains a cation from a strong base (KOH) and an anion from a strong acid (HNO 3 ).

3. 3 Salts that Form Basic Solutions A salt solution containing ions of a weak acid and strong base Is a basic solution. Has an anion of the weak acid that attracts H + from water. Example: KHCO 3 forms a basic solution because its anion forms a weak acid (H 2 CO 3 ), but its cation is from strong base (KOH). HCO 3 - + H 2 O H 2 CO 3 + OH - Anion of Forms Solution is basic weak acid weak acid

4. 4 Salts that Form Acidic Solutions A salt solution containing ions of a strong acid and a weak base Is an acidic solution. Has an cation of the weak base that produces H + in water. Of NH 4 Cl, for example, is acidic because it has the cation of a weak base (NH 3 ) and a cation of the strong acid (HCl). NH 4 + + H 2 O NH 3 + H 3 O + Cation of Forms a Solution is acidic weak base weak base

5. 5 Changes in pH for Salts in Water Table 14.10 Copyright © 2008 by Pearson Education, Inc. Publishing as Benjamin Cummings

6. 6 Learning Check Predict whether a solution of each salt will be 1) acidic2) basicor 3) neutral A. Li 2 S (aq) B. Mg(NO 3 ) 2 (aq) C. NH 4 Cl (aq)

7. 7 Solution Predict whether a solution of each salt will be 1) acidic2) basicor 3) neutral A. Li 2 S (aq) 2) basic; S 2- forms HS - and OH - B. Mg(NO 3 ) 2 (aq) 3) neutral C. NH 4 Cl (aq) 1) acidic; NH 4 + produces H 3 O +