1. Ascorbic acid can be reduced to
dehydroascorbic acid.

True/False

2. When does the titration endpoint occur in the Vitamin C
analysis lab (be specific)?

3. An unknown sample is initially analyzed and found to have a
peak intensity of 3250 counts. A 10 ppm standard of the same sample
shows a peak intensity of 1250 counts. What is the concentration of
the unknown sample?

4. What is the primary use of the chromatograms from a GC-MS
instrument?

5. What is the concentration, in ppm, that results when 5 mg of
a compound is dissolved in 2000 grams of solvent?