1. Q Neutralization Curves: Potentiometric Methods
Dr. Prem D. Sattsangi
Copyright © 2009

2. During a titration experiment, we added 25mL of water to 25
During a titration experiment, we added 25mL of water to 25.00mL of AcOH(aq) sample. The first pH reading was 3.75.
(a) what is the [H3O+] of the diluted solution?
(b) what would be the [H3O+] before dilution?
(c)Calculate the Ka of acetic acid using the data, if [AcOH] is M
Ka = [H3O+] x [AcO-]
[AcOH]

3. Neutralization Reactions
NaOH (aq) + AcOH (aq)  NaOAc (aq) + H2O
For the neutralization of 25.00mL AcOH, 5.5mL of 0.113M NaOH are used. Calculate:
(a) moles of NaOH used:
(b) moles of AcOH:
(c) Molarity of AcOH:

4. Ionization of H3PO4
Phosphoric acid is a triprotic acid which ionizes in the following three steps
(1) H3PO4  H2PO4- + H+
(2) H2PO4-  HPO42- + H+
(3) HPO4-  PO43- + H+
Loss of the proton occurs one at a time.

5. The Calomel Electrode