Efficacy of silver nitrate

Analytical chemistry is used to precipitate chloride ions, and silver nitrate is used as the working standard to calibrate sodium chloride solution.

Inorganic industry is used to make other silver salts.

Electronic industry is used to manufacture conductive adhesive, new gas purifying agent, A8x molecular sieve, silver-plated work clothes, live working gloves, etc.

The photographic industry is used to manufacture photographic materials, such as cinematographic films, X-ray photographic negatives and photographic films.

Electroplating industry is used for silver plating of electronic components and other handicrafts, and is also widely used as silver plating material for mirrors and thermos bottles.

The battery industry is used to produce silver-zinc batteries.

Used medicinally as bactericide and corrosive. Daily chemical industry is used to dye hair. Used for the determination of chlorine, bromine, iodocyanide and thiocyanate in analytical chemistry.

Silver nitrate will turn gray-black when it meets organic matter and decompose into silver. Pure silver nitrate is stable to light, but its aqueous solution and solid are often stored in brown reagent bottle due to the lack of purity of general products. When silver nitrate is heated to 440℃, it is decomposed into silver, nitrogen, oxygen and nitrogen dioxide. The aqueous solution and ethanol solution are neutral to litmus, and the pH value is about 6. The boiling point is 444℃ (decomposition). It is oxidizing. In the presence of organic matter, light will turn gray or gray-black. Silver nitrate can precipitate or coordinate with a series of reagents (see coordination compounds).

For example, it reacts with hydrogen sulfide to generate black silver sulfide Ag2S precipitate; React with potassium chromate to generate reddish-brown silver chromate Ag2CrO4 precipitate; Reacting with disodium hydrogen phosphate to generate yellow silver phosphate Ag3PO4 precipitate; It reacts with halogen ions to form AgX precipitate of silver halide. It can also react with alkali to generate brownish-black silver oxide Ag2O precipitate. It reacts with oxalate ions to form white silver oxalate Ag2C2O4 precipitate. Silver nitrate can react with NH3, CN- and SCN- to form various coordination molecules.

Used for cyanide-free silver plating, such as silver plating with thiosulfuric acid, silver plating with hydrochloric acid, silver plating with ammonium sulfamate, silver plating with sulfosalicylic acid, etc. It is the source of silver ions. The content of silver nitrate has certain influence on the conductivity, dispersibility and precipitation rate of silver plating solution. The general dosage is 25-50g/L. ..

The ammonia solution of silver nitrate can be reduced by organic reducing agents aldehyde and sugar. Therefore, it is a reagent for detecting aldehydes and sugars. It is also used to determine chloride ion, catalyst for manganese determination, electroplating, photography and porcelain coloring.

References:

Baidu encyclopedia? argentum nitricum