26.2 - Identifying aldehydes and ketones Flashcards
1
Q
What is used to detect the presence of the carbonyl functional group in aldehydes and ketones?
A
Brady’s Reagent
2, 4-DNP
2
Q
What is produced by Brady’s Reagent if there is a carbonyl group present?
A
Yellow/orange precipitate
3
Q
Once a compound has been identified as containing a carbonyl group, what can be added next?
A
Tollens’ reagent
4
Q
What is Tollens’ reagent?
A
A solution of silver nitrate in NH3 (aq)
5
Q
How could you distinguish between an aldehyde and a ketone?
A
Add Tollens’ reagent
If silver mirror is produced, the compound is an aldehyde
6
Q
What ions does Tollens’ reagent contain? What do they act as?
A
Ag + ions
Act as an oxidising agent
7
Q
When Tollens’ reagent is added to an aldehyde, what product is formed?
A
Carboxylic added
