Fermentation

2 Pages 437 Words

Fermentation

Introduction: Fermentation is any of a set of chemical reactions that split complex organic compounds into comparatively simple substances. In simpler terms, fermentation is a chemical reaction that splits organic compounds into simple substances. When fermentation occurs a compound is broken down into a new substance. CO2 (carbon dioxide) is produced by yeast. This occurs because CO2 lowers pH. Then, as the pH decreases Bromthymol blue turns yellow. The temperature matters because it affects things. When the temperature is cold it causes molecules to slow down. One example of this is an ice cube, or anything having to do with frigid temperatures. Also, when the temperature is warm it causes molecules to speed up. An example of this is boiling water, or anything having to do with heat. The temperature of some chemical reactions can sometimes be an extreme issue. If the temperature were to vary, in some chemical reactions, it could be fatal. If you conduct an experiment of fermentation correctly using yeast and Bromthymol blue, and keep the temperature of one sample at 30ºC and the temperature of another sample at 20ºC, the sample with a temperature of 30ºC will change colors quicker because it is warmer.

Methods: 1. Add a quantity of yeast suspension to two tubes that comes three centimeters from the top.
2. Place a rubber tube into each test tube and seal by wrapping it in parafilm.
3. Put the test tubes aside for now.
4. Acquire four beakers from the teacher.
5. Fill two of the four beakers halfway with Bromthymol blue solution.
6. Label the residual beakers “A” and “B” with a glass-marking pencil.
7. Fill beakers A and B approximately two-thirds full with warm water.
8. Keep the temperature of the water in beaker A at 30°C and the water in beaker B at 20°C.
9. Position one test tube in beaker A and the other in beaker B.
10. Put the free end of each rubber tube into a beaker of Bromth...