ORGANIC CHEM - ORGANIC ANALYSIS Flashcards
1
Q
What is the test for alkenes?
A
bromine water
2
Q
What is the +ve result for alkenes?
A
colour change from orange to colourless
3
Q
What is the test for primary and secondary alcohols?
A
warm with acidified potassium dichromate
4
Q
What is the +ve result for a primary/secondary alcohol?
A
colour change from orange to green
5
Q
What are the 2 tests for aldehydes?
A
- warm with tollen’s reagent
or - warm with fehling’s solution
6
Q
What is the +ve result for an aldehyde with both tests?
A
- tollen’s reagent: from colourless to silver mirror
- fehling’s solution: from blue to orange-red precipitate
7
Q
What is the test for a carboxylic acid?
A
add Na2CO3 (sodium carbonate)
8
Q
What is the +ve result for a carboxylic acid?
A
effervescence
9
Q
What is the test for halide ions?
A
warm with HNO3 and add AgNO3
10
Q
What are the +ve results for halide ions?
A
Cl^-: white precipitate
Br^-: cream precipitate
I^-: yellow precipitate
11
Q
A
