ALDEHYDES AND KETONES

1>Experiment 1– 2,4-Dinitrophenylhydrazones:

- Picture taken before heating the mixture:

Double Brace: Shows reaction of methyl ethyl ketone in experiment 1 before heating. Double Brace:  shows reaction of benzaldehyde in experiment 1,  before heating.                       

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-Picture taken after heating the mixture:

    Double Brace:  shows reaction of methyl ethyl ketone in experiment 1,  after  heating. Double Brace:  shows reaction of benzaldehyde in experiment 1,  after  heating. Note the Precipitate at the bottom.                                                                                                                                                                                                                                                                    

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2>Experiment 2-Semicarbazones:

-Picture taken before warming the mixture:

 

 

 

 

 

 

 

 

 

 

Double Brace:  shows reaction of methyl ethyl ketone in experiment 2,  before  heating. Double Brace:  shows reaction of benzaldehyde in experiment 2,  before  heating.

 

 

 

 

 

 

 

 

 

 

 

-Picture taken after warming the mixture:

Double Brace:  shows reaction of methyl ethyl ketone in experiment 2,  after  heating. Double Brace:  shows reaction of benzaldehyde in experiment 2,  after  heating. Note the white precipitate.                                                                                                                                                                                    

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3>Experiment 3- Chromic Acid Reaction:

-Note the color of the solutions below:

Double Brace: Methyl Ethyl Ketone Solution Double Brace: Benzaldehyde Solution Double Brace: Propanal Solution                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4>Experiment 4 – Iodoform Test:

 

                                                                                                                                                                                                                                                                                                                       

 

 

 

 

 

 

 

 

 

Double Brace: Methyl Ethyl Ketone Solution after heating. Note the yellow color precipitate seen at the bottom.

 

Double Brace: Methyl Ethyl Ketone Solution before heating. Note the precipitate seen at the bottom.