Chemical formula: HAuCl 4 . It is obtained by reacting gold with chlorine in hydrochloric acid. 2Au+3Cl 2 +2HCl→2HAuCl 4 It is a golden or reddish yellow crystal (monoclinic system) that is highly deliquescent. It corrodes the skin, and when its aqueous solution is exposed to light, it deposits purple colloidal gold on the surface. When heated, it decomposes into chlorine, hydrogen chloride, and gold. Its specific gravity is about 3.9, and it is easily soluble in water and alcohol, and soluble in ether. It is used in photography, gold plating, the manufacture of ruby glass, and as a reagent for alkaloids. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
化学式 HAuCl4 。金を塩酸中で塩素と反応させて得られる。 2Au+3Cl2+2HCl→2HAuCl4 黄金色ないし赤黄色の結晶 (単斜晶系) で,潮解性が強い。皮膚を腐食し,水溶液に光を当てると表面に紫色のコロイド金を析出する。加熱すると塩素,塩化水素,金に分解する。比重約 3.9 ,水,アルコールに易溶,エーテルに可溶。写真,金メッキ,ルビーガラスの製造,アルカロイド用試薬などに用いられる。 出典 ブリタニカ国際大百科事典 小項目事典ブリタニカ国際大百科事典 小項目事典について 情報 |
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