Practice MT 2 -

[Zellmer, Robert]

For version 1 of the practice exams for MT 2, question #3 uses the following,

[K+] = 0.0750 M.

Since it gave a unit most of you probably figured out this is the conc. of the K+ ion.
The square brackets used like this, [solute], generally means conc of solute and
generally means molarity.  You will see it again in other chapters, especially if you
take 1220.

Also, for some of the fill-in-the blank questions in the Carmen versions the
expected units aren't given.  For instance in version 1, #7, it asks for the
volume of 0.1125 M Ca(OH)2 required to reach the end-point of a titration.
It doesn't state if this should be liters or milliliters.  On might assume mL since
the other volume is in milliliters but then again molarity is in liters.

It looks like #14 on version 2 has the same problem.  So does #28 but one
would hopefully use molarity as the unit for conc. since the conc. given are
molarity.

I don't see any problems in version 3 with these types of problems.

I may have missed some.  All the PDF version have only multiple-choice type
questions and thus don't have this problem.

Dr. Zellmer




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