Aldehydes and Ketones - Testing for A & K & C' Acids Flashcards
(8 cards)
1
Q
What are the basis for differentiating between carbonyl?
A
Aldehydes can be further oxidised.
ketones CANT
2
Q
In tollens write the equation for which the complex is formed?
A
NH3 (aq) + AgNO3 (aq) —> [(Ag(NH3)2]+
3
Q
How would you conduct a tollens test reagent?
A
Heat gently
4
Q
What is a positive test for tollens result?
A
Silver deposit mirror (ALDEHYDE)
5
Q
What is a negative test for tollens result?
A
No Silver deposit (KETONE )
6
Q
Explain how Tollens works?
A
Ag+ REDUCED to Ag(s), while aldehyde is OXIDISED to carboxylic acid
7
Q
What is the test for a carboxylic acid?
A
Add Na2CO3 to test substance
8
Q
What is the positive result for the carboxylic acid?
A
Effervescence cause by release of CO2 (g) during neutralisation reaction.
