ammonium acetate obtained in the laboratory, for example, by reacting a concentrated, ie glacial acetic acid and ammonium carbonate (also known as ammonium -carbonate).The reaction proceeds with the formation of ammonium acetate and unstable carbonic acid (H2CO3), which immediately decomposes into water and carbon dioxide.
can also tide 80% interest acetic acid to 10% -th solution of ammonia (ammonia).The reaction is carried out at low temperatures, for example, dropping flask with the reactants into a vessel containing crushed ice with vigorous shaking.The f
iltrate was evaporated to yield ammonium acetate.
ammonium acetate in the laboratory can be also be obtained from acetic acid nitrile (acetonitrile), when heated with water.The reaction proceeds thus:
CH3CN + 2H2O = CH3COONH4
CH3CN + 2H2O = CH3COONH4
in industrial environments, the main method of production of ammonium acetate - the reaction of acetic acid and aqueous ammonia solution (analogue laboratory method number 2).Thus, the diluted product are obtained either different concentrations (to be used as deicers, for example), or it is subjected to, followed by evaporation, drying and cleaning.
certain amount of ammonium acetate as a by-product, can also be obtained by chemical treatment of wood with ammonia, resulting diacylation cellulose.
Tip 2: How to get from acetic acid, ammonium acetate, ammonium acetate
- aka ammonium acetate - a chemical formula SH3COONH4.His appearance - thin colorless crystals rapidly "deliquescent" on the air.It is extremely hygroscopic, very soluble in water.It is used in various industries - in organic and analytical chemistry, laboratory practice (as a component of buffer solutions), the textile industry, in the food industry (as a preservative), etc.How can I get the ammonium acetate?
- - two-neck flask (or a three-neck, which could find) with grinds;
- - separating funnel with ground joint, an appropriate one of the throats of the bulb;
- - a large bowl of cold water (better if also with chunks of ice);
- - concentrated acetic acid;
- - ammonia;
- - glass funnel with a paper filter;
- - the capacity to evaporate;
- - Buchner funnel with filter paper.
The flask pour a little concentrated acetic acid (at least 70%, better than 80%), and insert into one throat funnel with ammonia - ammonium hydroxide (eg 10%).Then gently place the bottom of a flask in a container of cold water, and start gradually and slowly poured ammonia, occasionally shaking the entire contents of the flask.
time of completion of the reaction can be accurately determined by a sharp, unpleasant smell of ammonia: this means that ammonia is no longer "linked" with acetic acid.Remove the funnel, pour the solution into the container to evaporate and remove the liquid in a water bath.If it is seen that mechanical solution contaminated with impurities - better pre-filter.
After a while, when the water evaporates, you will see the resulting ammonium acetate.In most cases, it will be a shapeless "sticky" mass - to clarify once again that the ammonium acetate is extremely hygroscopic!Remove excess moisture conventional filtration is almost impossible, and therefore passed to resort to filtration on a Buchner funnel with a paper alcohol.The resulting crystals of ammonium acetate have to move quickly in dry, tightly sealable container and store it away.
If possible, use a special laboratory mixer with a paddle on a long rod passed through a central "hole" three-necked flask with thin sections, it eliminates the need to hand-shake flask.Of course, in this case the bulb is securely mounted on a tripod.
better to work under the hood (for ammonia).When using a Buchner funnel, it is necessary to carefully examine her flask, and make sure the absence of any chips, cracks.
This substance is used in various industrial and laboratory practice: as a component fluids used de-icing;in the food industry as a preservative;as a reagent in some kinds of organic synthesis;in laboratory research work, as a component of the buffer solutions, as well as in the deposition of proteins.
- ammonium acetate formula