fermentation of sugar prac question (1 Viewer)

[Bainesy]

this is the one where you add sugar and yeast and it makes ethanol + CO2.

my teacher has asked that the class hand up a written report on this practical and he added several follow up questions.

im stuck one. it says to suggest modifications to the experiment and explain them.

i cant think of any modifications that would really have any effect on the experiment, the whole thing seems straightforward to me

any help appreciated

 

[henry08]

Temperature - (the yeast reacts under an ideal temeprature range, so perhaps this could be mroe closely maintained)

Weighing - use more accurate scales (to more dp)

 

[Forbidden.]

Temperature - (the yeast reacts under an ideal temeprature range, so perhaps this could be mroe closely maintained)

Weighing - use more accurate scales (to more dp)

And that ideal temperature range is blood temperature i.e. 37.5^oC

 

[Bainesy]

I was just looking through a textbook and it said ideal conditions for fermentation involve no oxygen.

Wouldnt removing the oxygen be a modification?

But how on earth can you remove oxygen from the air?

 

[brenton1987]

I was just looking through a textbook and it said ideal conditions for fermentation involve no oxygen.
Wouldnt removing the oxygen be a modification?
But how on earth can you remove oxygen from the air?

Ferment in a sealed flask. The yeast will use the initial oxygen and then continue with anaerobic fermentation to produce ethanol and carbon dioxide.