Distinguish Between Aldehyde And Ketone Flashcards

1
Q

Using Fehling’s solution

Describe a positive test and what does it tell you

A
  1. Mix Fehling’s solution 1 and Fehling’s solution 2 in a test tube
  2. 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

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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

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