1. Bell Work!
Timmy used litmus paper to test an unknown substance. He could tell that the substance was a clear liquid and it seemed to be bubbling. He also knew that he had seen it before so it must be something pretty familiar. When he used the indicator during his test, he saw that the red litmus paper turned blue. His lab partner predicted that the unknown substance was Sprite (because of the clear fizzing). Timmy disagreed…but why?

2. Preparing for TCAP… SPI 0807.9.1: All About Atoms
The smallest part of an atom is the __________.
electron
SPI : All About the Periodic Table
How many protons does an element have with an atomic number of 5 and a mass number of 10.9? 5
SPI : Acids and Bases
Acids turn red litmus paper…
red

3. If something had a pH of 2, it would be…
Let’s Race!
If something had a pH of 2, it would be…
ACID

4. Let’s Race!
OH- represents…
BASE

5. The name for H+ (or H3O+) is…
Let’s Race!
The name for H+ (or H3O+) is…
HYDRONIUM ION

6. Let’s Race!
Water has a pH of… 7

7. Let’s Race!
Sour Taste
ACID

8. Let’s Race!
Slippery Feel
BASE

9. Let’s Race!
pH greater than 7
BASE

10. Let’s Race!
Reacts with metal
ACID

11. Let’s Race!
Bitter taste
BASE

12. Let’s Race!
Has a pH of 8.5
BASE

13. The pH Scale
Chapter 14

14. Strengths of Acids and Bases
Acids and bases can be strong or weak.
Strength vs. Concentration =
NEUTRAL
ACID
BASE

15. Strong vs. Weak Acids:
STRONG ACID—all the molecules break apart and produce H+ ions
H+ H+
H+ H+ H+
H H+ H+
H+ H+ H+ H+ H+
H+ H+ H+
H+ H+
H H+ H+
WEAK ACID—a few molecules break apart and form H+ ions

16. Examples of Acids:
STRONG: sulfuric acid, hydrochloric acid WEAK: acetic acid, citric acid, carbonic acid

17. Strong vs. Weak Bases:
STRONG BASE—all the molecules break apart and produce OH- ions
WEAK BASE—few of the molecules break apart and form OH- ions

18. The pH Scale:
The pH of a solution is a measure of the hydronium ion concentration in the solution. (Or how many H+ there are…)
Remember!
Acid = less than 7
Neutral = 7
Base = more than 7

19. Today’s Assignment