1. Chapter 24: Solutions, Acids, and Bases
Section 4: Strength of Acids and Bases

2. Strong and Weak Acids and Bases
Strength of Acids and Bases
Strong and Weak Acids and Bases
The strength of an acid or base depends on how many acid or base particles dissociate into ions.
When a STRONG ACID dissolves in water, almost 100 percent of the acid molecules dissociate into ions.

3. Strong and Weak Acids and Bases
Strength of Acids and Bases
Strong and Weak Acids and Bases
When a WEAK ACID dissolves in water, only a small fraction of the acid molecules dissociates into ions.

4. When a Weak Acid dissolves in water almost 100 % of the acid molecules dissociate into ions.
True
False

5. Strength of Acids and Bases
Strong and Weak Bases
A STRONG BASE dissociates completely in solution.
A WEAK BASE is one that does not dissociate completely.

6. When a Strong Base dissolves in water almost 100 % of the base molecules dissociates into ions.
True
False

7. Strength and Concentration
Strength of Acids and Bases
Strength and Concentration
The terms STRONG AND WEAK refer to the ease with which an acid or base dissociates in solution.
DILUTE AND CONCENTRATED are used to indicate the concentration of a solution, which is the amount of acid or base dissolved in the solution.

8. Dilute and concentrated relates to which terms?
Ease with which an acid or base dissociates in a solution.
Use to indicate the concentration of a solution.
[Default]
[MC Any]
[MC All]

9. Strong and Weak relates to which terms?
Ease with which an acid or base dissociates in a solution.
Use to indicate the concentration of a solution.
[Default]
[MC Any]
[MC All]

10. The pH measures how acidic or basic a solution is.
Strength of Acids and Bases
pH of a Solution
The pH of a solution is a measure of the concentration of H+ ions in it.
The pH measures how acidic or basic a solution is.

11. pH is measure of ____ ions.
H2O H+
OH-
[Default]
[MC Any]
[MC All]

12. pH of a Solution One way to determine pH is by using INDICATOR PAPER.
Strength of Acids and Bases
pH of a Solution
One way to determine pH is by using INDICATOR PAPER.
The final color of the pH paper is matched with colors in a chart to find the pH.
An instrument called a pH meter is another tool to determine the pH of a solution.

13. Strength of Acids and Bases
Blood pH
The pH of blood must remain between 7.0 and 7.8
Some enzymes cannot work outside this pH range.
BUFFERS are solutions containing ions that react with additional acids or bases to minimize their effects on pH

14. What is the difference between a strong acid and a weak acid?
Question 1
What is the difference between a strong acid and a weak acid?
Weak acids almost completely dissociate.
Strong acids almost completely dissociate.
By spelling only.

15. Question 2
What is the difference between the terms “strength” and “concentration?”
Strength refers to the ease with which an acid or base dissociates in solution. Concentration is the amount of an acid or base dissolved in the solution.
Concentration refers to the ease with which an acid or base dissociates in solution. Strength is the amount of an acid or base dissolved in the solution.

16. Question 3
The pH of a solution is a measure of the concentration of _________ in the solution. H+
H3O+
COOH
HCl
[Default]
[MC Any]
[MC All]