Quiz
1. What is the pH of a 5.0 x 10-6 M solution of CsOH?
A.
B.
C.
D.
5.3
2 x 10-9
8.7
need to know the equilibrium constant
2. Formic acid (HCO2H) has a pKa of 3.744. What is Kb for the
formate ion (HCO2-)? Show your work.
A.
B.
C.
D.
1.80 x 10-4
5.55 x 10-11
10.26
3.744
Quiz
3. How many milliliters of 0.100 M KI are necessary to reach the
equivalence point when titrating 40.0 mL of 0.0350 M
Hg2(NO3)2? Show your work. The reaction is:
Hg 22  2I- 
 Hg 2 I 2(s)
A.
B.
C.
D.
28.0 mL
32.0 mL
14.0 mL
none of the above
4. The equivalence point of a titration occurs:
A.
B.
C.
D.
when all of the analyte has been titrated (reacted).
usually just before the endpoint.
Both A and B
Neither A or B