Distinguish Between Aldehyde And Ketone Flashcards
1
Q
Using Fehling’s solution
Describe a positive test and what does it tell you
A
- Mix Fehling’s solution 1 and Fehling’s solution 2 in a test tube
- Add a few cm^3 of resulting solution to the liquid in a test tube and warm in a water bath
Blue solution changes to give a red precipitate - aldehyde present
2
Q
Using Tollens’ reagent
Describe a positive test and what does it tell you
A
Mix a few cm^3 of the liquid with ammonia and silver nitrate solution in a test tube and warm in a water bath
Colourless solution changes to give a silver mirror - aldehyde present