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CHM4411 EXAM #2
Distributed 10/27/09
Instructions:
Read the entire exam and put your name on all pages
.
Answer the following 7
problems on 4 pages in the context of the notation and conventions of our lectures. You may
consult <10 kg of your
own
notes and textbooks; sharing is of any material or devices is not
allowed.
You may use any portable computation device that is
not
in any way
networked
.
Report all numerical results to at least three significant figures (unless otherwise specified in the
problem) for credit.
Please work alone.
R = 8.31447 J/(K
.
mol) = 0.0820574 (L
.
atm) / (K
.
mol)
Your name on this exam states the assertion:
I hereby pledge that I have neither given nor received unauthorized aid during this exam
Problem#1
Unambiguously indicate whether each of the following statements is
T
rue or
F
alse
___
T
___
In water at 25
o
C, the mobility of Li
+
is less than that of both Br

and H
+
.
___
T
___
The conductivity of an electrolyte solution increases with increasing concentration of
the electrolyte.
___
F
___
According to the DebyeHückel limiting law, the mean ionic activity coefficient of a
dilute electrolyte solution,
γ
±
, is negative.
___
F
___
The equivalent conductivity of an electrolyte solution increases with increasing
concentration of the electrolyte.
___
F
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