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Silver arsenite, Ag3AsO3

Addition of potassium hydroxide to a concentrated solution of Silver nitrate and arsenious acid precipitates yellow silver arsenite, Ag3AsO3. It is also produced, along with another yellow salt, 2Ag2O,As2O3, by the action of potassium or ammonium arsenite on Silver nitrate. Silver arsenite melts above 150° C., decomposing into silver and silver arsenate. It is soluble in potassium-arsenite solution; and also dissolves in potassium-hydroxide solution and in ammonium hydroxide, yielding solutions from which metallic silver is gradually deposited.
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