Silver sulfite

Silver Sulfite. Silver sulfite, Ag2S03, is obtained as a white precipitate when sulfur dioxide is bubbled through a solution of silver nitrate. Silver sulfite is unstable to light and heat, and solutions decompose when boiled. 

Silver strikes, 9 823 Silver sulfadiazine, 22 637 clinical use of, 22 679 Silver sulfate, 22 673 as catalyst, 22 685 in electrolytic coloring, 22 686 Silver sulfide, 22 673-674 for batteries, 22 684 natural occurrence of, 22 668 Silver sulfite, 22 674 Silver sulfonantimonite, natural occurrence of, 22 668 Silver telluride, natural occurrence of, 22 668... 

The reaction rate at pH = 9 could be followed only when the silver ion concentration was kept to a low value. This was accomplished by using as a source of silver ions the soluble silver sulfite complex ion which has a dissociation constant of about 3 X 10-9 at 25°. The undissociated complex itself is not involved in the reaction to any significant extent. The reaction rate varies as about the half power of the silver ion concentration under these conditions. The dependence upon the hydroquinone concentration, as indicated by the data in Table I, is somewhat greater than a direct proportionality (James, 7). 

Sodium stannite (which is not a developer) reacts very rapidly with silver nitrate or with the silver sulfite complex, and the rates have not... 

The cyanine dye, 3,3 -diethyl-9-methylthiacarbocyanine chloride, had a much greater effect than gelatin in decreasing the reaction rate of the silver chloride. The rate of reduction of silver chloride varied linearly with the amount of silver chloride surface not covered by the dye, and the rate attained at complete coverage was of the order of one-thousandth that for the undyed precipitate. The dye exerted scarcely any effect upon the reduction of silver ions from silver sulfite complex solution. 

Barium chloride Strontium chloride Silver nitrate White precipitate of the respective sulfite, the precipitate being soluble in dilute hydrochloric acid At first no change upon addition of more reagent, white crystalline precipitate at silver sulfite forms, which darkens to metallic silver upon heating... 

Silver nitrate solution is usually used as the source of silver ions. A precipitate is obtained by mixing silver ions with any chloride and this is used as the basis for a test to detect the presence of a chloride. In testing unknown solutions using silver nitrate, it is usual to add dilute nitric acid to prevent the precipitation of other insoluble silver compounds, such as silver carbonate and silver sulfite. 

The peak potential for the cathodic reduction of the silver sulfite complex [Ag(S03)2] shifts towards more positive value as the... 

Aqueous SO2 and SOs precipitate silver sulfite, Ag2S03, white, from Ag It resembles precipitated AgCl, rapidly darkening on exposure to light. It is reduced to Ag by excess of SO2 and is soluble in excess of Its solubility in water is less than 0.2 mM. Boiling water tends to decompose Ag2S03 to Ag and Ag2[S20e] ... 

Silver sulfite, A SO3, is soluble in NH3, but then Ag precipitates fairly readily. Treatment of Ag2S03 with a strong acid liberates SO2. 

---