Fermentation – Practical Investigation
AIM
We are going to investigate the fermentation of glucose with yeast.
EQUIPMENT
 2 Boiling tubes
 Measuring cylinder
 Bung and delivery tube
CHEMICALS
 Limewater
 Glucose
 Yeast
 Warm Water
EXPERIMENT INSTRUCTIONS
1. Put a large spatula of glucose into the boiling tube.
2. Add 30ml of warm water.
3. Swirl the tube to dissolve the sugar.
4. Add a large spatula of yeast to the mixture
5. Bung the boiling tube with a bung and delivery tube.
6. Swirl the tube to mix the mixture.
7. Put 15ml of limewater in a different boiling tube.
8. Put the delivery tube from the yeast mixture into the limewater.
9. What can you see in the limewater?
QUESTIONS.
1. Draw a diagram of the experiment.
Use a pencil and ruler and lots of labels!
2. What gas is being produce
3. What happens to the limewater when this gas is produced?
4. What other chemical is made in this process?
5. What is this process called?
6. What TYPE of process specifically is this?
HINT: There is not lots of oxygen involved…
7. Which drinks are made by this process?