Alcohols Flashcards
What does the name of all alcohols end in
–ol
What is alcohols functional group
–OH (hydroxyl group)
What is a unique thing about the first three alcohols
They are polar so they are soluble in water
What is alcohols general formula
CnH2n+1 OH
Name two properties of alcohol
The hydroxyl group are responsible for its properties
It contains hydrogen bonding as it contains oxygen and hydrogen (This means when compared to alkanes of a similar mass, an alcohol will have a higher BPT)
Alcohols have multiple hydroxyl groups this means that they can be?
Diols (2) and triol(3)
What type of melting and boiling points does diols and triols have and what is their viscosity
They have a high melting & boiling point and they also have higher viscosity
Why do diols and triols have higher melting and boiling points?
This is because there are more hydrogen bonding present
Further oxidation of PRIMARY ALCOHOLS form what?
Carboxylic Acid
Why can’t a Tertiary alcohol be oxidised
This is because it will involve breaking up the carbon chain
During the reaction with acidified Potassium permanganate (MnO4-) what is the colour change?
The purple permanganate is reduced to colourless
During a reaction with acidified dichromate solution (K2Cr2O7) what is the colour change
The orange dichromate ions is reduced to green
What is the colour change for copper (ii) oxide and heat
From black to red
What is the colour change in the oxidation of aldehydes with Benedict’s solution/Fehling’s solution
From blue to orange-red
What is the colour change when a Tollens solution is used
A ‘silver mirror’ is formed
