1. Schedule Today (3/4): Continue Chapter 8
Should have read through Section 8.7 (at least)
Wednesday (3/6): Continue Chapter 8
Should have read through Section 8.8 (at least)
Friday (3/8): Continue Chapter 8
Should have read all of Chapter 8
Monday (3/11): Finish Chapter 8

2. Titrations with 0.100M NaOH
25.0 mL of 0.100M HCl 25.0 mL of 0.100M HC2H3O2 (Ka=1.8 x 10–5; pKa=4.74)

3. Clicker Question What are the major species?
Determine the pH of a 1.00M aqueous solution of NaHCO3.
Ka1 for H2CO3 = 4.3 x 10–7
Ka2 for H2CO3 = 4.8 x 10–11
What are the major species?
What are the reactions in solution?
Which reaction dominates?

4. Clicker Question a) 6.37 b) 7.52 c) 8.09 d) 8.34 e) 10.32
Determine the pH of a 2.00M aqueous solution of NaHCO3.
Ka1 for H2CO3 = 4.3 x 10–7
Ka2 for H2CO3 = 4.8 x 10–11
a) 6.37
b) 7.52
c) 8.09
d) 8.34
e) 10.32

5. Polyprotic Acids: H2CO3
Ka1 = 4.3 x 10–7 Ka2 = 4.8 x 10–11 pKa1 = 6.37 pKa2 = 10.32

6. Diprotic Acid Titration pH Curve
Essentially two pH curves!

7. Polyprotic Acids: H3PO4
pKa1 = 2.12 pKa2 = 7.21 pKa3 = Ka1 = 7.5 x 10–3 Ka2 = 6.2 x 10–8 Ka3 = 4.8 x 10–13

8. Trprotic Acid Titration pH Curve

9. Polyprotic acid titration: H3PO4