Question One:

A. A 25.00 ml pipette sample of 2.50 mg/ml ascorbic acid solution was titrated with an iodine solution, requiring 31.75 ml of the iodine solution to reach the end-point. This same iodine solution was used to titrate 25.00 ml of fruit juice, requiring 29.34 ml to reach the end-point. What is the concentration of ascorbic acid in the fruit juice sample in mg/ml?

B. A food sample is known to contain malic acid (MA), citric acid (CA), and ascorbic acid (AA). Design, and briefly describe, an experiment using the titrations described in this lab exercise (or other methods) to determine the non-AA acidity of the food sample; i.e. the acidity arising from MA and CA alone.