Nitric acid oxidises cevadine completely; with potassic permanganate it yields acetic and oxalic acids; with chromic acid it forms acetaldehyde and carbon dioxide.
By the action ofacetaldehyde on alcohol at 100 deg.
The higher aldehydes of the series resemble acetaldehyde in their general behaviour.
Condensation with Aldehydes By treating phenolsulphonic acid with acetaldehyde in the usual way, a viscous brown mass is obtained, which is very soluble in water, the solution being of a brown colour.
Condensation with formaldehyde always succeeds, with acetaldehyde and benzaldehyde only partly.
For this reason it is possible to determine the freezing point curves of acetaldehyde and paraldehyde.
This is in harmony with the fact that the polymerisation of acetaldehyde is accompanied by evolution of heat.
The method used by Kostytscheff for the separation of alcohol and aldehyde (treatment with bisulphite) has also proved unsatisfactory in their hands and the results obtained as to the reduction of acetaldehyde by yeast, etc.
The most noteworthy effect is that the production of acetaldehyde is increased both in autofermentation and [p112] in sugar fermentation.
The decomposition of pyruvic acid into acetaldehyde and carbon dioxide has already been fully discussed (Chapter VI).
An interesting interpretation of the phenomena of fermentation was attempted by Schade [1906] based upon the conception that glucose under the influence of catalytic agents readily decomposes into acetaldehyde and formic acid.
On the whole it cannot be said that the evidence gathered from experiments on the reduction of acetaldehyde and methylene blue is very convincing.
Chromic acid oxidizes it to acetic acid and carbon dioxide; potassium permanganate oxidizes it to pyruvic acid; nitric acid to oxalic acid, and a mixture of manganese dioxide and sulphuric acid to acetaldehyde and carbon dioxide.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "acetaldehyde" in a variety of sentences. We hope that you will now be able to make sentences using this word.
