Lab11 Kianoosh.pdf - Volumetric Analysis Part I:...

LATTC
CHEMISTRY 101
Volumetric Analysis
Part I: Preparation of the NaOH Solution
first name last name
date full names of lab partner(s)
Four lab periods are assigned to do the four parts of this experiment. On the first day (Part I) your instructor will
discuss how the four parts of this experiment will be accomplished, how a titration works and how to perform the
necessary calculations. You will also prepare an approximate 0.1 M NaOH solution. On the second day (Part II) you will
obtain a more precise value for the molarity of your NaOH solution by standardizing the NaOH solution. i.e. The
molarity of the NaOH solution will be determined more precisely by titrating it against a known high-purity solid acid.
You will use your standardized NaOH solution to determine the molecular mass of an unknown acid (part III) and the
percent of acetic acid in a commercial vinegar preparation (part IV). Your success on parts III & IV will depend on how
accurately you have determined a precise molarity value for your NaOH solution (part II). Your scores on Parts III & IV
of this experiment will also depend on how close your obtained values are to the actual values. Every student should be
finished with Parts III and IV by the end of the fourth lab period. It is necessary to know the following:
solution of liter
solute of moles
M Molarity  ) (
or
V
n
M 

n = M·V
n: moles of solute, V: volume of solution in liters
Dilution involves adding solvent to a more concentrated solution to make a more dilute solution.