1. Warmup
Put the following descriptors in the correct spaces on the Venn diagram…

2. Taste Bitter
Taste Sour
pH of 0-6.9
pH of
Start with “H”
End with “OH”
Milk
Vinegar
Feel slippery
Is an electrolyte
Turns litmus paper pink
Ammonia
Lemon Juice
Detergent
Turns litmus paper blue
Can harm skin and tissue

3. Ch. 15 & 16 - Acids & Bases
II. pH (p )

4. H2O + H2O H3O+ + OH- Kw = [H3O+][OH-] = 1.0  10-14M2
A. Ionization of Water
H2O + H2O H3O+ + OH-
Kw = [H3O+][OH-] = 1.0  10-14M2

5. A. Ionization of Water
Find the hydroxide ion concentration of 1.0  10-2 M HCl.
[H3O+][OH-] = 1.0  10-14M2
[1.0  10-2][OH-] = 1.0  10-14M2
[OH-] = 1.0  M

6. Compare your exponents for [H3O+] and [OH-]
A. Ionization of Water
How to tell if a solution is acidic or basic:
Compare your exponents for [H3O+] and [OH-]
Whichever has the smallest number for the exponent is MORE concentrated
[H3O+] =1.0  10-2 M
[OH-] = 1.0  M
Acidic or basic?
Acidic

7. pouvoir hydrogène (Fr.)
B. pH Scale 14 7
INCREASING
ACIDITY
INCREASING
BASICITY
NEUTRAL
pH = -log[H3O+]
pouvoir hydrogène (Fr.)
“hydrogen power”

8. pH = -log[H3O+] pOH = -log[OH-] pH + pOH = 14
B. pH Scale
pH = -log[H3O+]
pOH = -log[OH-]
pH + pOH = 14

9. B. pH Scale What is the pH of 0.050 M HNO3? pH = -log[H3O+]
Acidic or basic?
Acidic

10. B. pH Scale
What is the molarity of HBr in a solution that has a pOH of 9.6?
pH + pOH = 14
pH = 14
pH = 4.4
pH = -log[H3O+]
4.4 = -log[H3O+]
-4.4 = log[H3O+]
[H3O+] = 4.0  10-5 M HBr
Acidic