I've had a few students ask about what sample calcs should be done for
exp 5.  The manual does show some.  There's a couple of others to show.
Essentially you show a sample for every calculation done, no matter
how simple.

Part A:

    moles of KHP                  (listed in manual)    just for trial 1

    Molarity of NaOH              (listed in manual)    just for trial 1

    Avg. Molarity of NaOH

    % difference (do this by subtracting the molarities for the two trials and
                            dividing by the average molarity)

Part B:

    moles of NaOH    just for trial 1

    Molar Masses     just for trial 1    (do these calc. right on the report sheet
                                            on page 42 as if your unknown acid
                                            is mono-, di- or triprotic or put them
					    with the other sample calc. and just
					    write "see sample calc. page" on page 42)

    Avg. molar mass    - add a line for this at the bottom of page 41.  You need
                         this for the on-line data input.  Do this using the molar
                         masses assuming the acid is monoprotic.

My suggestion is to do these calc. first and fill out your report sheet.  Then 
double check your calculations and numbers.  Then go on line to enter your data.
Make sure you use the correct sig. fig.

For the sample calculations for the molar mass in Part B on page 42 for monoprotic,
diprotic and triprotic acids you can put the calculations on the report page or
put them along with the other sample calculations on a separate page then on the
report sheet just write "see sample calculations page".

Futhermore, people often mistakenly think KHP is potassium hydrogen phosphorus.
It is not.  KHP is an acronym for potassium hydrogen phthalate, KHC8H4O4.


Dr. Zellmer