The unique color changes will help your students understand the fermentation process.
A glucose solution is inoculated with yeast in an Erlenmeyer flask and then connected with a tube to a gas-collecting chamber. As fermentation occurs, the depletion of the oxygen in the flask causes a dramatic color change in the indicator in the flask. Simultaneously, the carbon dioxide produced from the reaction causes a color change in a different indicator solution in the collecting chamber.
Enough indicator solutions, yeast, and sugar are provided to conduct the demonstration seven times. Detailed instructions and background information are provided. A 250 mL flask, one-hole stopper, test tube, glass tube, and plastic tubing are required for completion of the demonstration.
Additional ResourcesNo Additional Resources at the time.
Flinn Catalog/Reference Manual Page 874
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