Experiment No. 11
Question: What happens when Yeast has
sugar to feed on?
Experiments: To show what happens when Yeast has sugar to feed on.
You will need:
1. We made up the yeast solution using warm water.
2. This solution was placed in the vial with a little sugar.
3. The balloon was carefully placed over the neck of the vial.
4. The balloon was left for about an hour at room temperature.
5. We recorded the results.
The balloon started to inflate.
The yeast respired in the presence of sugar and oxygen to give CO2 (carbon dioxide) and H2O (Water). The CO2 produced caused the balloon to inflate.
C6H12O6 + O2 H2O + CO2 + Energy
(glucose) Yeast C6H12O6 + O2 H2O + CO2 + Energy
Find out more!
This chemical reaction is used in bread making. The carbon dioxide produces the holes in bread which allow it to rise. The breakdown of sugar gives us energy.
Sixth Class Experiments