exp 6 (SAL) - acid/base properties of salt solutions

[Robert Zellmer]

The manual pages for exp 6 (SAL) look quite different from what
you're use to. You still need to write out a procedure in the notebook.
You should include the "boxes" or tables in your notebook and fill them
in as you go along (writing somewhere in your notebook exactly
what you're doing).  For example look at pages 51 & 52.   You'll see
two boxes on those pages.  For these boxes put something in your
notebook where you can answer the bolded questions. This is part of
your procedure.  You'll need to record your observations in tables similar
to what's in the Data to Collect section (pages 57-58).  For Part A you'll
collect data in a table similar to data Table 1, which you should have 
in your
notebook.  For Part B you'll need Data Tables 2 & 3.  Not in Data Table 2
they've started you off with examples of what should be there for NaCl and
FeCl3.  They're there as "starters".  You would list the compounds which
would allow you to investigate the affect on pH of just the cation 
without the
anion interfering.  The anion should not react with H2O, it shouldn't 
undergo
hydrolysis to form a basic soln.  It should be a "neutral" anion (remember
what was stated in class about the conjugate bases of the strong acids).

For Data Table 2 you should have 3 columns as shown.  In the last
column write the equation(s) for the reaction occurring to produce
the observed result.  There are examples there for NaCl and FeCl3
in a multiple choice format.  For those two pick the correct eqn from
what's given.  For the others you have to come up with the rxns
on your own.  Then you fill in Data Table 3 in the notebook.

You'll do similar things for the anions in Part C (table on page 52 and
the data tables on page 58).

Then answer the questions on page 53 in the notebook.

Remember, write a procedure before lab, make these tables in the notebook
or as you go along and keep a notebook as usual.  The procedure you
write before coming to lab could change as you're going along and you
discover things and you write those changes in your notebook. You're
writing out the procedure or changing it as you go along, kind of like you
would in a real lab.

We actually covered this material in lecture today and discussed a number
of the salts, or similar ones, in lecture.

I hope this helps.

Dr. Zellmer