Both solutions were deaerated before mixing. In their experiments, a buffered silver sol prepared by dextrose reduction of ammoniacal silver nitrate was mixed with a solution of hydroquinone in a hydrogen atmosphere. Ī more careful investigation was made by Perry et al. ĭuring preparation of an oxidising agent on a larger scale than described, addition of warm sodium hydroxide solution to warm ammoniacal silver nitrate with stirring caused immediate precipitation of black silver nitride which exploded, Similar incidents had been reported previously, including one where explosion appeared to be initiated by addition of Devarda s alloy (Al-Cu-Zn), The explosive species separates at pH values above 12.9, only produced when alkali is added to ammoniacal silver solutions, or when silver oxide is dissolved with ammonia, The Sommer Market reagent mixture used to identify cellulose derivatives led to a severe explosion. Only a small volume should be prepared just before use, any residue washed down the sink with a large quantity of water, and the test-tubes rinsed with dilute nitric acid. Great care must be taken in the preparation and use of this reagent, which must not be heated. When the reagent is requir, mix equal volumes (say, 1 ml.) of solutions A and JB in a clean test-tube, and add dilute ammonia solution drop by drop until the silver oxide is just dissolved. It is preferable to use Tollen s ammoniacal silver nitrate reagent, which is prepared as follows Dissolve 3 g.
![dilute ammonia solution dilute ammonia solution](https://i1.wp.com/www.aplustopper.com/wp-content/uploads/2016/12/ammonia-gas.jpg)
![dilute ammonia solution dilute ammonia solution](https://lightcat-files.s3.amazonaws.com/clutch_answers_images/1581952333965.jpg)
525), add a few drops of cold aqueous benzo quinone solution a silver mirror or (more generally) a dark precipitate of metallic silver is formed in the cold.
![dilute ammonia solution dilute ammonia solution](http://indonesian.industrial-ammonia.com/photo/pl20814175-reagent_grade_ammonia_solution_water_clear_25_dilute_ammonium_hydroxide.jpg)
Oxidation, (a) Ammoniacal silver nitrate.