Silver carbonate

Silver (I ) carbonate

Light yellow powder

Fixed

6.08 g · cm -3 ( 20 ° C)

218 ° C ( decomposition)

Poorly in water ( 32 mg · l-1 at 20 ° C)

Risk

0.01 mg · m-3

• 2168 mg · kg -1 ( LD50, mouse, oral)
• 3731 mg · kg -1 ( LD50, rat, oral)

-505.8 KJ / mol

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Silver carbonate is a chemical compound of the silver from the group of carbonates.

Production and representation

Silver can be recovered as sodium carbonate by precipitation from solutions containing silver, such as silver nitrate, by alkali.

Properties

Newly produced silver is white and discolored rapidly yellowish. How many silver compounds, it is light sensitive and should be stored in the dark. It crystallizes in the monoclinic crystal system. When heated above 218 ° C it decomposes to give off carbon dioxide.

While the connection is only sparingly soluble in water, it dissolves readily in acids such as nitric acid or sulfuric acid, potassium cyanide and potassium carbonate in, forming double salts.

Use

Silver carbonate is in the synthetic organic chemistry using. It is applied on kieselguhr, it acts as an oxidizing agent. A significant role of the compound in the Koenigs- Knorr method. In this case be obtained from halogen-substituted monosaccharide derivatives selectively 1,2-trans - glycosides. By Silver the halogen is like, and it can be a glycoside alcohols are formed.

It is used for the extraction of silver powder and for the separation of chloride, bromide and iodide in the ion chromatographic determination of anions in salt water.