OXIDES OF GOLD Aaurous oxside, Au

OXIDES OF GOLD
Aaurous oxside, Au O.—this oxide is prepared by decomposing aurous chloride, AuCl , or the corresponding bromide by potash in the cold (berzelius), when a violet precipitate form which is blackish when moist, but greyish when dry. When freshly precipitataed is soluble both in alkalies and in cold water, forming an indigo blue solution , wiht brownish fluorescene, and on warming the solution, with slightly the corresponding hydrate is precipitated.it is also prepared by the action of nitrate of mercury on the trichloride , and by boilling aurate of potash with organic compounds, such as citrates or tartrates , or boilling a solution of the trichloride with the potassium salts of these acids. When prepared according to these methods, aurous oxide always contains a certain proportion of metalic gold. Kruss obtainedthe oxide pure by reducing brom-aurate of potassium at 0* by SO , passing in the gas only until the solution became colourless, after which an axcess of gas would have precipitated metallic gold. Aourous hydrate is then precipitated by potash , and after being agglomarated by boilling , it is filtered , washed with cold water,dried , and heated to 200 , to expel the water of hydration. At 250 it is resolved into gold and oxygen. Hydrochloric acid decomposes aurous oxide into metallic gold and auric salt, slowly in the cold, quickly at aboilling temperature; aqua regia dissolves the oxide , but sulphuric and nitric acids are without action on it, while weak bases at once decompose it.
An intermediate oxide, AuO, is prepared as a black powder by dissolving metallic gold un aqua regia containing an excess of hydrochloric acid the adding an axcess of carbonate of potash, little studied , but the temperature at wich it decomposes has been fixed at 205 and its hydrate has been prepared.
Auric oxide, Au O , -- this the best known oxide, is a black

Hasil (Bahasa Indonesia) 2:

OKSIDA EMAS
Aaurous oxside, Au O.-oksida ini disiapkan oleh membusuk klorida aurous, AuCl, atau bromida sesuai dengan kalium dalam dingin (Berzelius), ketika bentuk endapan violet yang kehitaman ketika lembab, tetapi keabu-abuan saat kering. Ketika baru precipitataed larut baik dalam alkali dan air dingin, membentuk solusi biru indigo, wiht fluorescene kecoklatan, dan pada pemanasan solusi, dengan sedikit hidrat bersangkutan precipitated.it juga disiapkan oleh aksi nitrat merkuri pada triklorida, dan oleh Boilling aurate kalium dengan senyawa organik, seperti sitrat atau oksalat, atau Boilling larutan triklorida dengan garam kalium dari asam ini. Ketika dibuat menurut metode ini, oksida aurous selalu mengandung proporsi tertentu dari emas metalik. Kruss obtainedthe oksida murni dengan mengurangi brom-aurate kalium pada 0 * oleh SO, lewat di gas hanya sampai larutan menjadi tidak berwarna, setelah sebuah axcess gas akan diendapkan emas metalik. Hidrat Aourous kemudian diendapkan oleh kalium, dan setelah agglomarated oleh Boilling, disaring, dicuci dengan air dingin, kering, dan dipanaskan sampai 200, untuk mengusir air dari hidrasi. Pada 250 itu diselesaikan menjadi emas dan oksigen. Asam klorida terurai oksida aurous menjadi emas logam dan garam aura, perlahan-lahan dalam dingin, cepat di aboilling suhu; aqua regia larut oksida, tetapi sulfat dan nitrat asam tanpa tindakan di atasnya, sementara basa lemah sekaligus membusuk itu.
Sebuah oksida menengah, AUO, dipersiapkan sebagai bubuk hitam dengan melarutkan logam un emas aqua regia mengandung kelebihan asam klorida yang menambahkan axcess karbonat kalium, sedikit dipelajari, tapi suhu di Wich terurai telah diperbaiki pada 205 dan hidrat yang telah disiapkan.
Auric oksida, Au O, - ini oksida paling dikenal, adalah hitam