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H-9
Report: Experiment H - Unknown Acid
Name ____________________________________
Section ___________ Date ___________________
Laboratory Instructor________________________
Titration of an Unknown Acid
Unknown Code: _______________
Calculations must be shown with the correct number of significant figures and with units.
1.
Graph : The graph must be drawn accurately on graph paper with an 1.0 mm grid. It can be
drawn in pencil, but calculations must be done in ink. The rest of the report must also be done in
ink. Show on the graph:
(a)
how to determine the pH of the equivalence point.
(b)
how to determine the pK
a
of the unknown acid and calculate the value of K
a
.
You must clearly indicate on the graph how to obtain these values and include the
theoretical basis for the determination of K
a
.
(c)
indicator chosen and indicator range.
2.
For each titration, calculate the number of moles of base required to neutralize the acid sample.
Show all your calculations.
