Wrap-Up

In this lesson you have gotten an introduction to acids and bases. You have learned about the properties of acids and bases, the conceptual approaches that are used to explain the nature of acids and bases, how they are formed, and how they can be recognized or identified either by formula or by lab tests. You have learned about pH and the auto-ionization phenomenon of water. You have also learned to do calculations that relate the concentrations of hydronium ion and hydroxide ion to both pH and the auto-ionization of water.

Be sure to review the objectives for this lesson and take the self quiz to test yourself on how well you understand these topics.

Self-Quiz

1. When HI dissolves in water, what ions are formed? Use Bronsted-Lowry theory to answer.
   

2. Which of the following properties indicates an acidic solution?
   I. pH below 7
   II. Turns red litmus paper blue
   III. Turns phenolphthalein pink
   a. I only
   b. II only
   c. I & II
   d. I & III
   e. II & III
   

3. Which of the following reactions is characteristic of a base?
   a. Dissociates in water to give hydronium ion
   b. Reacts with water to give hydrogen gas
   c. Reacts with metal to give hydrogen gas
   d. Reacts with carbonates and bicarbonates to give off carbon dioxide
   e. Reacts with ammonium compounds to give off ammonia
   

4. Under the Lewis definition, an electron pair acceptor is ___________.
   

5. Write a balanced equation for the neutralization of potassium hydroxide and sulfuric acid
   

6. If the concentration of hydronium ion in a solution is 0.000675 M, what is the solution's pH?
   

7. In a solution with pH = 5.00, what is the hydroxide ion concentration?
   

8. The concentration of hydroxide ions in a juice sample is 2.05*10^-11 . What is the pH of this sample?

Answers to Self-Quiz

1. When HI dissolves in water, what ions are formed? Use Bronsted-Lowry theory to answer.
   H₃O⁺ and I^-
   

2. Which of the following properties indicates an acidic solution?
   I. pH below 7
   II. Turns red litmus paper blue
   III. Turns phenolphthalein pink
   a. I only
   b. II only
   c. I & II
   d. I & III
   e. II & III
   

3. Which of the following reactions is characteristic of a base?
   a. Dissociates in water to give hydronium ion
   b. Reacts with water to give hydrogen gas
   c. Reacts with metal to give hydrogen gas
   d. Reacts with carbonates and bicarbonates to give off carbon dioxide
   e. Reacts with ammonium compounds to give off ammonia
   

4. Under the Lewis definition, an electron pair acceptor is ___________.
   an acid
   

5. Write a balanced equation for the neutralization of potassium hydroxide and sulfuric acid
   2 KOH (aq) + H₂SO₄ (aq) → K₂SO₄ (aq) + 2 H₂O (l)
   

6. If the concentration of hydronium ion in a solution is 0.000675 M, what is the solution's pH?
   3.17
   

7. In a solution with pH = 5.00, what is the hydroxide ion concentration?
   1.0*10^-9
   

8. The concentration of hydroxide ions in a juice sample is 2.05*10^-11 . What is the pH of this sample?
   3.31