Sour

Usage examples of acetic.

As for drinking, I am something of a chemist and I have yet to find a liquor that is free from traces of a number of poisons, some of them deadly, such as fusel oil, acetic acid, ethylacetate, acetaldehyde and furfurol.

To convert, for example, a solution of a substance in hydrochloric acid into a solution of the same in acetic acid, alkali should be added in excess and then acetic acid.

The determination is rendered sharper and less liable to error by the addition of a few drops of acetic acid to convert the chromate into bichromate.

The small quantity of white flocculent precipitate which may be observed in the acetic acid solution before titrating, contains the whole of the iron as ferric arsenate.

Boil off the gas, add ammonia until a precipitate is formed, and then acidify somewhat strongly with acetic acid.

Add acetic acid until the solution is acid and the precipitate is quite dissolved.

The iron is reduced to the ferrous state and phosphate of alumina precipitated in an acetic acid solution.

From baryta, which it also resembles, it is distinguished by not yielding an insoluble chromate in an acetic acid solution, by the solubility of its chloride in alcohol, and by the fact that its sulphate is converted into carbonate on boiling with a solution formed of 3 parts of potassium carbonate and 1 of potassium sulphate.

In solutions rendered faintly acid with acetic acid, they give a yellow precipitate with bichromate of potash.

To separate these, ammonia is added till the solution is alkaline, and then acetic acid in slight excess.

After precipitating as ammonic-magnesic phosphate with sodium phosphate, and well washing with ammonia, it is dissolved in dilute hydrochloric acid, neutralised with ammonia, and sodic acetate and acetic acid are added in the usual quantity.

In the case of ferric salts, half the quantity of acetic acid will be better, as then the ferric iron will be precipitated, and a colourless solution will be left, in which the end reaction is more readily distinguished.

If acetic acid is used instead of nitric in the first instance this addition of water is unnecessary.

The two filtrates are mixed and treated with a little acetic acid, and the cobalt and nickel are then precipitated as sulphides by a current of sulphuretted hydrogen.

Wool dyes best in a slightly acid bath, and this may be taken advantage of in dyeing the yellows and blues of this group by adding a small quantity of acetic acid.