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Topic 8: Acids, Bases, and Salts
16. Effect of adding an acid or a base to a solution: Recalling concept facts
1. As aqueous solution becomes more acidic, the hydroxide ion concentration of the solution
1) Increases 2) Decreases 3) Remains the same
2. As a solution becomes more basic, the hydrogen ion concentration in the solution
1) Increases 2) Decreases 3) Remains the same
+
3. As an acidic solution is added to a basic solution, the H ion concentration in the solution
3) Remains the same
2) Decreases
1) Increases
-
4. As a basic solution is added to an acidic solution, the OH ion concentration of the solution
3) Remains the same
2) Decreases
1) Increases
5. As a solution of a base is added to an acidic solution, the pH of the solution
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1) Increases
2) Decreases
3) Remains the same
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6. Which substance, if added to water, will increase the OH concentration of water?
-
1) NaCl 2) KNO3 3) LiOH 4) HNO3
7. Hydronium ion concentration of an acidic solution will decrease with the addition of which
substance? 2) K2SO4 3) KOH 4) KCl
1) KNO3
8. The pH of a solution will decrease with the addition of which compound? 4) CaCl2
1) CH3COOH
3) NaOH
2) NH3
9. A student observed that the pH of a solution increases with the addition of substance X to the
solution. Which compound could substance X be?
1) Ammonia ` 3) Nitric acid
4) Sodium chloride
2) Ammonium chloride
10. As CH3COOH is added to water, the H concentration of the water solution
+
1) Decreases, and the pH increases 3) Increases, and the pH increases
2) Decreases, and the pH decreases 4) Increases, and the pH decreases
+
11. When a solution of NaOH is added to water solution, the H concentration will
-
1) Increase, and OH concentration will increase
-
2) Increase, and OH concentration will decrease
-
3) Decrease, and OH concentration will decrease
-
4) Decrease, and OH concentration will increase
12. As NH4OH is added to HCl solution, the pH of the solution
-
1) Decreases as the OH ion concentration increases
-
2) Decreases as the OH ion concentration decreases
-
3) Increases as the OH ion concentration increases
-
4) Increases as the OH ion concentration decreases
13. When a solution of sulfuric acid is added to a solution of sodium hydroxide, the concentration of
hydrogen ions in the solution
1) Decreases, and the pH increases
2) Increases, and the pH decreases
3) Decreases, and the pH decreases
4) Increases, and the pH increases
14. When a solution of ammonia is added to a solution of hydrochloric acid, the pH of the solution
-
1) Increases as OH ion concentration increases
-
2) Increases as OH ion concentration decreases
+
3) Decreases as H ion concentration increases
+
4) Decreases as H ion concentration decreases
Copyright©2010 E3 Scholastic Publishing. All Rights Reserved. SurvivingChem.com 259
Topic 8: Acids, Bases, and Salts
16. Effect of adding an acid or a base to a solution: Recalling concept facts
1. As aqueous solution becomes more acidic, the hydroxide ion concentration of the solution
1) Increases 2) Decreases 3) Remains the same
2. As a solution becomes more basic, the hydrogen ion concentration in the solution
1) Increases 2) Decreases 3) Remains the same
+
3. As an acidic solution is added to a basic solution, the H ion concentration in the solution
3) Remains the same
2) Decreases
1) Increases
-
4. As a basic solution is added to an acidic solution, the OH ion concentration of the solution
3) Remains the same
2) Decreases
1) Increases
5. As a solution of a base is added to an acidic solution, the pH of the solution
Teacher Preview Copy
1) Increases
2) Decreases
3) Remains the same
Teacher Preview Copy
6. Which substance, if added to water, will increase the OH concentration of water?
-
1) NaCl 2) KNO3 3) LiOH 4) HNO3
7. Hydronium ion concentration of an acidic solution will decrease with the addition of which
substance? 2) K2SO4 3) KOH 4) KCl
1) KNO3
8. The pH of a solution will decrease with the addition of which compound? 4) CaCl2
1) CH3COOH
3) NaOH
2) NH3
9. A student observed that the pH of a solution increases with the addition of substance X to the
solution. Which compound could substance X be?
1) Ammonia ` 3) Nitric acid
4) Sodium chloride
2) Ammonium chloride
10. As CH3COOH is added to water, the H concentration of the water solution
+
1) Decreases, and the pH increases 3) Increases, and the pH increases
2) Decreases, and the pH decreases 4) Increases, and the pH decreases
+
11. When a solution of NaOH is added to water solution, the H concentration will
-
1) Increase, and OH concentration will increase
-
2) Increase, and OH concentration will decrease
-
3) Decrease, and OH concentration will decrease
-
4) Decrease, and OH concentration will increase
12. As NH4OH is added to HCl solution, the pH of the solution
-
1) Decreases as the OH ion concentration increases
-
2) Decreases as the OH ion concentration decreases
-
3) Increases as the OH ion concentration increases
-
4) Increases as the OH ion concentration decreases
13. When a solution of sulfuric acid is added to a solution of sodium hydroxide, the concentration of
hydrogen ions in the solution
1) Decreases, and the pH increases
2) Increases, and the pH decreases
3) Decreases, and the pH decreases
4) Increases, and the pH increases
14. When a solution of ammonia is added to a solution of hydrochloric acid, the pH of the solution
-
1) Increases as OH ion concentration increases
-
2) Increases as OH ion concentration decreases
+
3) Decreases as H ion concentration increases
+
4) Decreases as H ion concentration decreases
Copyright©2010 E3 Scholastic Publishing. All Rights Reserved. SurvivingChem.com 259
