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Time-Release Vitamin C Tablets

Experiment #31 from Chemistry with Vernier

Education Level
High School


By slowly releasing a vitamin or a medicine throughout the day, timed-release tablets offer a simple alternative to multiple doses. There are several different methods used to achieve the timed-release effect. One common method involves covering the medicine with a polymer coating that allows it to slowly permeate into the body.


In this experiment, you will

  • Compare the behavior of timed-release vitamin C tablets with regular vitamin C tablets when each is added to distilled water.
  • Use a pH Sensor to monitor the pH value of the two different types of vitamin C tablets over an elapsed time of approximately twelve minutes.

Sensors and Equipment

This experiment features the following sensors and equipment. Additional equipment may be required.

Option 2

pH Sensor

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This experiment is #31 of Chemistry with Vernier. The experiment in the book includes student instructions as well as instructor information for set up, helpful hints, and sample graphs and data.

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