Please edit this document and answer the following questions:
1. Please feel Table 1. Please show your calculations and equations.
All Data tables and graphs are labeled according to lab instructions.
Table 1: Hot Sauce and Ketchup Titration Data
Mass of sauce (g)
Concentration of NaOH used (M)
(mL) NaOH needed to reach
(mol) NaOH needed to reach
equivalence point [show work
Concentration of C2H4O2 (mol/g of
sauce) [show work below]
Average Concentration of C2H4O2
(mol/g of sauce)
pH of solution at equivalence point
NaOH needed to reach half-
equivalence point (mL)
pH of solution at half- equivalence
mol NaOH needed (Hot Sauce Trial 1):
Concentration of C2H4O2 (Hot Sauce Trial 1):
mol NaOH needed (Hot Sauce Trial 2):
Concentration of C2H4O2 (Hot Sauce Trial 2):
Please show your calculations and equations
2. (a) Using your own half-equivalence point data from your experiment,
what is the experimental pKa for acetic acid in this reaction?
(b) Using this experimental pKa value, what is your experimental Ka for
acetic acid? (You must show all work to receive credit)
(c) Look up the accepted "actual" Ka value for acetic acid. How does your
value compare? Calculate the percent error for your experimental value.
(You must show all work to receive credit.)
3. What are some (as in more than one!) possible sources of error in your
experiment, and how could you account for these sources in future
experimental runs? Discuss in detail.
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