Reactions of Alcohols Flashcards
(7 cards)
1
Q
Primary alcohol to aldehyde
A
acidified potassium dichromate(VI)
Heat under reflux then distil to stop further oxidation
+water
2
Q
Primary alcohol to carboxylic acid
A
concentrated acidified potassium dichromate(VI) in excess then distil
+water
3
Q
Secondary alcohol to ketone
A
heat under reflex acidified dichromate
4
Q
Why do tertiary alcohols not oxidise?
A
No 2 H atoms are bonded to the C n COOH
5
Q
Tollens’
A
Warm aldehyde with Tollens’ reagent
Silver mirror
No reaction with a ketone
6
Q
Fehling’s
A
Warm gently with Fehling’s
Brick red ppt for aldehyde
No reaction for ketone
7
Q
Test for carboxylic acid
A
Solid NaCO3
White solid disappears, effervescence, cloudy
