Traditional Culture Encyclopedia - Photography and portraiture - Is silver carbonate precipitated?

Is silver carbonate precipitated?

Whether silver carbonate is precipitated depends on its solubility conditions. The specific analysis is as follows:

1. The specific analysis

In water, because silver carbonate is insoluble in water, it forms a precipitate. However, if silver carbonate is placed in hydrochloric acid or other acidic solutions, it will react with these substances to produce soluble silver chloride, and silver carbonate will no longer be precipitated. Therefore, it can be said that the state of silver carbonate in water is precipitation, but it may be liquid or dissolved in other solvents.

II. Introduction of Silver Carbonate

Silver Carbonate, an inorganic compound, has the chemical formula of Ag2CO3. The appearance of the newly prepared silver carbonate is white powder, which turns yellow after further heating, with a molecular weight of 275.75. It darkens when exposed to light and dry, and has strong photosensitivity.

It melts and decomposes at 218℃ to produce silver oxide and carbon dioxide. When further heated at high temperature, it is converted into silver. The relative density is 6. 77. Insoluble in water and ethanol, soluble in dilute nitric acid, ammonia water or potassium cyanide solution.

Application of Silver Carbonate

1. Photography field:

Silver Carbonate is a common photosensitive material for photographic film and paper. It can be converted into silver particles, and the sensitivity of silver particles can be used to capture light and record imaging. In black-and-white photography, films processed with silver carbonate can produce high-quality black-and-white photos.

2. Chemical analysis field:

Silver carbonate is widely used in chemical analysis. It can react with other compounds and be used to analyze the contents of sulfide, ammonia and chlorine. Silver carbonate can also form degradation products with other compounds, thus helping to determine some parameters in chemical reactions.

3. Making cinematographic film:

Silver carbonate can be used to make photographic film, color photographic emulsion, optical film and other photosensitive materials.

4. Electronic field:

In the electronic field, silver carbonate can be used in the manufacturing scene of microelectronic components in lithography process.

5. Medical field:

In the medical field, silver carbonate can be used to make conductive adhesives and other silver salt catalysts for sterilization and disinfection.