RP6-Tests for alcohol, aldehyde, alkene and carboxylic acid Flashcards
1
Q
Testing for alcohol
A
2
Q
What is the test for Alcohol?
A
Heat with Acidified potassium dichromate
3
Q
What happens when acidified potassium dichromate is added to a primary, secondary and tertiary alcohol?
A
Primary alcohol and secondary alcohol - changes from orange to green.
Tertiary alcohol - colour does not change
4
Q
Test for Aldehyde
A
5
Q
What is the test for an aldehyde?
A
Tollens reagent or Fehling’s solution
6
Q
What is tollens reagent made from?
A
7
Q
What is the colour change observed?
A
8
Q
What is fehlings solution made up of
A
9
Q
What is the colour change observed
A
10
Q
What is the test for an alkene?
A
Bromine water
11
Q
What is the observed chnage?
A
Decolourises bromine water
12
Q
What is the test for a carboxylic acid?
A
Sodium hydrogen carbonate - bubbles with Co2
