SLS SciChem (Band A) by Abdul Bari

EXAMPLE:

2018-06-27 09:51:36 UTC

GRP 1 (Alice, Ben, Chloe)
Factor 1: Pressure
How it affects the reaction:
The higher the pressure, the faster the reaction.

Why it affects the reaction in that manner.
The higher the pressure, the closer the particles are and the number of particles per unit volume increases. This increases the frequency of effective collisions, thus increasing the speed of reaction.

Grp 5 (Karen, Ka Mun, Ranjini, Wen Wei)

2018-07-03 01:11:27 UTC

Factor 1: Presence of yeast
How: the yeast breaks down glucose to form ethanol and carbon dioxide.

Why: yeast is bacteria and will feed on decaying items and form ethanol

Factor 2: Concentration of ethanol
How: to have a higher concentration of ethanol formed, there will be more reactants used at first
Why: the more the concentration of ethanol, there is more unit per volume which causes the frequency of effective collisions to increase.

Group 7 ( Melody , Ann , Ying Xuan , Lester

2018-07-03 01:11:45 UTC

Factor 1 : Presence of yeast .
How : It affects the speed of reaction .

Why : Yeast acts as a catalyst ,
speeding up the speed of reaction.

Factor 2 : Concentration of ethanol solution .

How : Fermentation will be stopped .

Why : The higher the concentration of ethanol solution , it will be too acidic for the yeast to survive . Yeast will be denatured , hence fermentation cannot take place .

Group 6

2018-07-03 01:12:06 UTC

(Yi fei, Gail, Dawnn, Emilia, Kimberly.)

Factor 1: Absence of oxygen
How it affects the fermentation of glucose : When oxygen is present, ethanol would not be produced.

Why: In the presence of oxygen, ethanol would be oxidised into ethanoic acid as this is a chemical property of all alcohols. Thus the final result of ethanol will not be achieved and therefore the reaction will be affected.

Factor 2: Temperature

How :At high temperatures, the catalyst would be denatured.

Why: All catalyst have an optimum temperature in which they work best in. At 37 degree celcius, the catalyst works the most efficiently. However at excessively high temperature the catalyst will denature. As a result, no reaction would take place affecting the fermentation of glucose.

Group 3 (Syahin, Amaxus, Annastasya, Christy, Qi En)

2018-07-03 01:12:18 UTC

1)Absence Of Oxygen
Why ?
With oxygen , the ethanol formed will react with oxygen to produce ethanoic acid.

How?
-oxidation

2)yeast
Why?
Yeast is the catalyst (enzyme)that speeds up
fermentation process.

How?
the presence of enzymes in yeast allows fermentation of glucose to produce ethanol and carbon dioxide.

group 1 ( jing wah, jodan, elijah, xavier, ka yan )

2018-07-03 01:12:39 UTC

Factor 1: Temperature
HOW? Because the solution has to be kept at 37 degrees celcius
WHY? because it is the optimal temperature for fermentation and upon too high of a temperature , it would denature.

Factor 5: yeast
HOW? Without the yeast, there would be no ethanol ><
WHY? Breaks down the glucose solution to form ethanol and carbon dioxide.

Group 4

2018-07-03 01:13:25 UTC

1)Temperature:
HOW?
Enzymes activity is highest at a optimum temperature
WHY?
when the temperature is too high, the enzymes will be denatured. And will be unable to break down the glucose molecules

2) Concentration of ethanol formed
HOW?
Fermentation process will be stopped
WHY?
the yeast will be killed, therefore fermentation will not take place as there will be the absence of yeast, and yeast is a needed cataylst for fermentation to take place.

GROUP 2

2018-07-03 01:18:11 UTC

1. Absence of Oxygen:
Oxygen is essential in fermentation as ethanol is oxidised at the end of the reaction to form ethanoic acid.

2. Concentration of ethanol formed: A high concentration of ethanol formed will stop the yeast from acting as a catalyst for the reaction because more yeast is used up.