1. Monday, November 16th Find your popsicle stick
Get out your notes
Make sure everyone at your table has a whiteboard, dry erase marker, and rag

2. 1
What are two kinds of molecules that commonly function as weak bases?

3. 2
Write the chemical equation and Kb expression for the ionization of the following bases:
Dimethylamine: (CH3)2NH
Carbonate ion: CO32-
Formate ion: CHO2-

4. 3
Calculate the molar concentration of hydroxide ions in a 0.075M solution of ethylamine (C3H5NH2)
Kb = 6.4 x 10-4
What’s the pH?

5. 4
Ephedrine, a central nervous system stimulant, is used in nasal spray as a decongestant. This compound is a weak organic base:
C10H15ON(aq) + H2O(l) ↔ C10H15ONH+(aq) + OH-(aq)
A 0.035M solution has a pH of What are the concentrations of all the species?
Calculate Kb for ephedrine.

6. 5
Although the acid-dissociation constant for phenol (C6H5OH) is listed in your book, the dissociation constant for the phenolate ion (C6H5O-) is not.
Explain why it is not necessary to list both.
The Ka for phenol is 1.3 x Calculate the Kb for the phenolate ion.
Is the phenolate ion a weaker or stronger base than ammonia? (Kb for ammonia = 1.8 x 10-8)
Which is more likely to occur – the acid-dissociation of phenol or base-dissociation of phenolate? Explain.

7. 6
Given that Ka for acetic acid is 1.8 x 10-8 and the Ka for hypochlorous acid is 3.0 x 10-8
Which is the stronger acid? Why?
Which is the stronger base – the acetate ion or the hypochlorite ion? Why?
Calculate the Kb values for the acetate ion and the hypochlorite ion.

8. Note on effects of Ka lab
You SHOULD have used the same volume of NaOH in both trials
If this didn’t happen, include potential reasons why in your error analysis

9. To Do Work on review questions 18-25 (due Tuesday)
Effects of Ka lab report (due Wed.)
Problem Set 4 (due Tuesday)
Problem Set 5 (due Wednesday)
Ch 16 test Thursday
17.1 notes due Friday
Ch. Retakes must be done by Tuesday, 11/24