[Marco]

The object of this experiment is to identify by observations a Primary Alcohol, an Aldehyde, a Ketone and a Carboxylic Acid. I am supplied with 4 compounds (A, B, C, D). I must find out the functional group present in each of them. To do so I am also supplied with a sodium carbonate solution; Fehling's solution A and Fehling's solution B (to be mixed and warmed them up with the compound); acidified sodium dichromate solution (to be warmed up with the compound). Now I have to add a few drops of each solution to each compound, separately, and record my observations and results. I have done this and my results are: in the compound A there is an Alcohol (because the colour of the precipitate changes from orange to blue/green); in the compound B there is a Carboxylic Acid (because effervescence occurs); in the compound C there is an Aldehyde (because the colour of the precipitate changes from dark-blue to red-brown) and finally in the compound D there is a Ketone (because there is no reaction and the precipitate does not change in colour).
Now I have to give a brief explanation and most of all I have to give EQUATIONS. May you help me with those exquations? Thank you so much!

[Schrödinger]

I think this website will come in handy. You'll get to know what exactly happens. Then you can frame your own equations

http://www.chemguide.co.uk/organicprops/carbonyls/oxidation.html