1. Acids, Bases, and pH
5.1A

2. sour slippery bitter H+ OH- (ionic compound) (ionic compound) < 7
> 7

3.            HCl NaOH HF H2S H2O2 Mg(OH)2 H2SO4 SiH4 HNO3
Acid
Base
Neither
HCl
NaOH HF
H2S
H2O2
Mg(OH)2
H2SO4
SiH4
HNO3
C2H4 H2           

4. H+ OH- Acids Bases When mixed with water, will release ______
HCl → H+ + Cl-
The more H+ an acid releases, the stronger the acid
NaOH → Na+ + OH-
The more OH- a base releases, the stronger the base H+
OH-

5. H+

6. pH < 7
pH > 7
pH = 7

7. acidic, pH < 7
neutral, pH ≈ 7
basic, pH > 7

10. How much more acidic are tomatoes than eggs?
Practice: Calculate the relative acidity of solutions.
How much more acidic are tomatoes than eggs?

12. Practice: Calculate the relative acidity of solutions.
How much more acidic are tomatoes than eggs? 8 - 4
= 4 10
= times more acidic 4

13. How much more acidic is soap than bleach?
Practice: Calculate the relative acidity of solutions.
How much more acidic is soap than bleach?

15. Practice: Calculate the relative acidity of solutions.
How much more acidic is soap than bleach? 12 - 10
= 2 10
= 100 times more acidic 2

17. How much more acidic is lemon than water?
Practice: Calculate the relative acidity of solutions.
How much more acidic is lemon than water?

19. Practice: Calculate the relative acidity of solutions.
How much more acidic is lemon than water? 7 - 2
= 5 10
= times more acidic 5

20. A pH indicator is a chemical that changes colour under different pH’s.

22. pH Indicator
A pH indicator is a chemical that changes colour under different pH’s.

26. Practice:
You test your saliva using methyl orange and bromothymol blue. Below are the results. What is the pH of your saliva?
pH indicator
Methyl Orange
Bromothymol Blue
colour change
yellow A B C D

28. Practice:
You test your saliva using methyl orange and bromothymol blue. Below are the results. What is the pH of your saliva?
pH indicator
Methyl Orange
Bromothymol Blue
colour change
yellow A B C D

29. Practice:
Chemical X turns Phenolphthalein pink and Indigo Carmine blue. What is the pH of Chemical X? A B C D

31. Practice:
Chemical X turns Phenolphthalein pink and Indigo Carmine blue. What is the pH of Chemical X? A B C D