Qualitative analysis Flashcards
(7 cards)
1
Q
How do you test for an Alkene?
A
- Add Bromine Water
- Observe discolouration from orange to colourless if positive.
2
Q
How do you test for a Haloalkane?
A
- Add Silver Nitrate in ethanolic solution in a 50°C water bath
- Chloroalkane; observe white precipitate
- Bromoalkane; observe cream precipitate
- Iodoalkane; observe yellow precipitate
3
Q
How do you test for a Carbonyl?
A
- Add 2,4-DNP
- Orange precipitate
4
Q
How do you test for an Aldehyde?
A
- Add Tollen’s reagent and warm
- Silver mirrored deposition
5
Q
How do you test for 1° and 2° Alcohols and Aldehydes?
A
- Add Acidified dichromate and warm in a water bath
- Colour change from Orange to Green
6
Q
How do you test for Carboxylic Acid?
A
- Add aqueous sodium carbonate
- Effervesence
7
Q
How do you test for a phenol?
A
- Add bromine to an aqueous solution of phenol
- Observe a whie precipitate form
