4D - Alcohols Flashcards Preview

AS Chemistry > 4D - Alcohols > Flashcards

Flashcards in 4D - Alcohols Deck (10):
1

Explain why the water solubility of the alcohols decreases as the chain length increases

Percentage of the molecule that is convered by the hydrogen bonds decrease, hence decreasing the solubility

2

Conditions required for the dehydration of alcohols?

Heat under Reflux 

Catalyst: Conc Sulfuric Acid ( excess) or Conc Phosphoric Acid

3

Define elimination

The removal of a molecule from a saturated molecule to make an unsaturated molecule

4

Name the 2 chemicals you need to make an oxidising agent for the alcohols.

 

Give the observation for a successful oxidation

Potassium dichromate (VI)

Aqueous sulphuric acid

 

Orange solution → Green solution

5

Conditions required for Primary alcohol → aldehyde?

 

What process is used to seperate out the aldehyde from the reaction mixture?

Oxidising agent

Suphuric acid

Heat under reflux

 

Distillation

6

Conditions required for primary alcohol → carboxylic acid

Oxidising agent

Sulphuric acid

Heat under reflux

 

7

1st and 2nd oxidation of a primary alcohol?

1st: alcohol → aldehyde

2nd: aldehyde → carboxylic acid

8

Conditions for secondary alcohol → ketone

Oxidising agent

Sulphuric acid

Heat under reflux

9

What happens when tertiary alcohols are heated with acidified potassium dichromate (VI)?

No change

10

Define nucleophilic substitution

A reactionin which a nucleophile is attracted to an electron-deficient carbon atom and replaces an atom or group of atoms on the carbon atom