Teacher manual for AP* and Advanced Chemistry labs. Has both the printed version and a flash drive with teacher tips, a PDF of teacher version and editable Word student version.
Vitamin C, also called L-ascorbic acid, is found in many foods. Most people expect orange juice to be the best source of vitamin C but other berries have a higher vitamin C content and juice drinks like Hi-C® have a great deal of added vitamin C. In these cases, it is difficult to perform a traditional acid–base titration because there may be more than one acid present. How can we accurately measure the vitamin C content present in foods?
What foods have the highest levels of vitamin C?
Students expand their understanding of titrations, carry out a redox titration, and then use the redox titration method to answer a question of their own design.
The student can design, and/or interpret data from, an experiment that uses titration to determine the concentration of an analyte in a solution. The student is able to design and/or interpret the results of an experiment involving a redox titration.
This experiment may require software and an interface for data collection.