Chapter 21 Alcohols Flashcards
1
Q
Define alcohols
A
Alcohols are a homologous series of organic compounds which have the hydroxyl functional group
2
Q
General formula of alcohols
A
CnH2n+1OH
3
Q
Trend down the group
A
- Molecular size increases
- Solubility in water decreases
- Stronger intermolecular forces, boiling point increases
4
Q
Chemical properties of alcohols
A
- Alcohols can be used as fuel can can undergo complete combustion or incomplete combustion
- Alcohols can be oxidised by acidified potassium manganate (VII) or oxygen in air to form carboxylic acid
Purple potassium manganate (VII) will turn colourless if alcohol is present
5
Q
How can alcohols be produce?
A
Fermentation of glucose
6
Q
Conditions of producing alcohols
A
-37 degree
-Yeast
-Absence of oxygen
7
Q
Why temperature cannot be too high
A
The enzymes of yeast will denature
