Silver Sulfate - Silver Sulfate

Japanese: 硫酸銀 - リュウサンギン

The chemical formula is Ag ₂ SO ₄ . It can be obtained by dissolving silver powder in concentrated sulfuric acid, adding dilute sulfuric acid to silver oxide or silver carbonate, or adding sulfuric acid to a silver nitrate solution. It has a colorless, shiny crystal but gradually turns black when exposed to light. Specific gravity is 5.45. Melting point is 652°C. It decomposes at 1,085°C to produce silver and sulfur dioxide. It has a cubic body-centered structure, but has lattice defects, which give it unusually high ionic conductivity, similar to that of an aqueous solution. Solubility in 100 g of water is 0.57 g (25°C). Evaporation of the concentrated sulfuric acid solution gives the acid salts AgHSO ₄ and AgH ₃ (SO ₄ ) ₂ .

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

化学式Ag₂SO₄。銀の粉末を濃硫酸に溶かす，酸化銀または炭酸銀に希硫酸を加える，硝酸銀溶液に硫酸を加えるなどの方法で得られる。無色の光沢ある結晶だが光に当たると徐々に黒変する。比重5.45。融点652℃。1085℃で分解し，銀と二酸化硫黄を生ずる。立方晶系で体心構造をもつが，格子欠陥を有し，そのため水溶液と同程度の異常に高いイオン伝導性をもつ。水100gに対する溶解度0.57g(25℃)。濃硫酸溶液を蒸発すると，酸性塩AgHSO₄およびAgH₃(SO₄)₂が得られる。

出典　株式会社平凡社世界大百科事典第２版について　情報

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