Berry Berry Easy is pleased to start a new series on the experiments that students will be doing in the laboratory. All important experiments will be documented with pictures so students can understand the experiments better. So, to starts things off, we will be preparing ethanol by fermentation using various feedstocks such as glucose, sugars (fruit sugars – banana, pineapple, orange, grapes, apple and papaya) and starches (potatoes, tapioca and rice).
The happy and studious ”models” that you can see for this experiment depicted here are from the Form 5SNB of SMK Dato’ Jaafar, Johor Bahru where the Berry Berry Teacher is currently teaching.
Berry Experiment – SPM Form 5 Chemistry – Glucose, Sugars/Starches as a Raw Material for Fermentation
This experiment is “Laboratory Work 2.3 – Preparation of Ethanol by Fermentation” from the Integrated Curriculum for Secondary Schools Chemistry Form 5 Practical Book (pg 38).
(Photo captions can be found below the photos)
One week of fermentation process.
Berry Berry Grape Sucessful Fermentation!
Paper filtering process.
Gurjivan,Gregory, Gabriel, David and Hong Yaw obtained the ethanol by the fermentation of glucose (natural raw material - sugar)
Si Hao, Sarveen, Kavi and Zebedee's fermentation product turned the limewater chalky after a week.
Yim, Wilfred, Mohd Noel, Wee Han and Jun Kai examined the colour and smell of the fermentation product.
Ying Long, Ching Sheng, Yi Jing, Sui Sin and Alvin are preparing for the next step - Distillation - to separate water and ethanol.
Now that you have viewed the experiment photos, feel free to ask any questions related to it. (Don’t just ask for answers though, as the feedstock and method used will not be identical)