About Silver Nitrate

2022-07-26

Silver Nitrate is an inorganic compound with the chemical formula AgNO3. It is a white crystalline powder, easily soluble in water, ammonia, glycerol, and slightly soluble in ethanol. Pure silver nitrate is stable to light, but its aqueous solution and solid are often stored in brown reagent bottles due to insufficient purity of the general product. It is used in photographic emulsions, silver plating, mirror making, printing, medicine, hair dyeing, testing Chloride ions, Bromide ions and iodine ions, etc. It is also used in the electronics industry.

Chemical properties
Silver nitrate turns gray-black when encountering organic matter, and decomposes into silver. Pure silver nitrate is stable to light, but its aqueous solution and solid are often stored in brown reagent bottles due to insufficient purity of the general product. Silver nitrate decomposes into silver, nitrogen, oxygen and nitrogen dioxide when heated to 444°C. Aqueous and ethanolic solutions are neutral to litmus, with a pH of about 6. The boiling point of 444 ° C (decomposition). Oxidative. In the presence of organic matter, it turns gray or gray-black when exposed to light. Silver nitrate can undergo precipitation or coordination reactions with a series of reagents. For example, react with hydrogen sulfide to form black silver sulfide Ag2S precipitate; react with potassium chromate to form reddish-brown silver Chromate Ag2CrO4 precipitate; react with disodium hydrogen Phosphate to form yellow silver phosphate Ag3PO4 precipitate; react with halide ions, A silver halide AgX precipitate is formed. It can also interact with alkali to form brown-black silver oxide Ag2O precipitation; interact with Oxalate ion to form white silver oxalate Ag2C2O4 precipitation, etc. Silver nitrate can react with NH3, CN-, SCN-, etc. to form various coordination molecules.

USE

Analytical chemistry was used to precipitate chloride ions, and silver nitrate, a working reference, was used to calibrate the sodium chloride solution. The inorganic industry is used to make other silver salts. The electronics industry is used in the manufacture of conductive adhesives, new gas purifiers, A8x molecular sieves, silver-plated uniform pressure suits and gloves for live work, etc. The photosensitive industry is used to manufacture photosensitive materials such as motion picture film, X-ray photographic film and photographic film. The electroplating industry is used for silver plating of electronic components and other handicrafts, and is also widely used as a silver plating material for mirrors and thermos flasks. The battery industry is used to produce silver-zinc batteries. In medicine, it is used as a fungicide and a corrosive agent. The daily chemical industry is used for dyeing hair, etc. In analytical chemistry it is used for the determination of chlorine, bromine, iodocyanide and thiocyanate. It is used for cyanide-free silver plating, such as thiosulfuric acid silver plating, hydrochloric acid silver plating, iminodisulfonic acid ammonium silver plating, sulfosalicylic acid silver plating, etc. as the main salt, and it is the source of silver ions. The silver nitrate content has a certain influence on the conductivity, dispersibility and precipitation speed of the silver plating solution. The general dosage is 25-50g/L. The ammonia solution of silver nitrate can be reduced by organic reducing agents aldehydes and sugars. Therefore, it is a reagent for the determination of aldehydes and sugars. Also used for the determination of chloride ions, the determination of manganese catalysts, electroplating, photography, porcelain coloring.

Silver Nitrate

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