Introduction to the Rarer Elements
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Of a characteristic yellow color, gold is the most malleable and ductile of the metals. It is about as soft as silver. It is insoluble in the common acids, but is attacked by aqua regia, chlorine, bromine, and by potas- sium cyanide in the presence of oxygen. It is dissolved in many reactions where oxygen is set free, e. G. By selenic acid, and by phosphoric or sulphuric acid in the presence of telluric acid, nitric acid, lead or manganese dioxide, chromium trioxide, or potassium permanganate. ...It is not attacked when suspended in sulphuric acid and treated with oxygen gas (Lenher, Jour. Amer. Chem. Soc. Xxvi, 550). It is somewhat soluble in hydrochloric acid in the presence of light and manganous chloride (Berthelot, Compt. Rend, cxxxvm, 1297), and in thiocarbamide in the presence of oxidizing agents (Moir, Proc. Chem. Soc. Xxn, 105, 165). It has also been found to be slightly attacked by alkali sulphides and thiosulphates. Moissan has distilled it in the electric furnace; he finds that when alloys of copper or tin with gold are subjected to distilla- lion, the copper and tin distil first (Compt.
What to read after Introduction to the Rarer Elements?
You can find similar books in the "Read Also" column, or choose other free books by Philip Embury Browning to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Of a characteristic yellow color, gold is the most malleable and ductile of the metals. It is about as soft as silver. It is insoluble in the common acids, but is attacked by aqua regia, chlorine, bromine, and by potas- sium cyanide in the presence of oxygen. It is dissolved in many reactions where oxygen is set free, e. G. By selenic acid, and by phosphoric or sulphuric acid in the presence of telluric acid, nitric acid, lead or manganese dioxide, chromium trioxide, or potassium permanganate. ...It is not attacked when suspended in sulphuric acid and treated with oxygen gas (Lenher, Jour. Amer. Chem. Soc. Xxvi, 550). It is somewhat soluble in hydrochloric acid in the presence of light and manganous chloride (Berthelot, Compt. Rend, cxxxvm, 1297), and in thiocarbamide in the presence of oxidizing agents (Moir, Proc. Chem. Soc. Xxn, 105, 165). It has also been found to be slightly attacked by alkali sulphides and thiosulphates. Moissan has distilled it in the electric furnace; he finds that when alloys of copper or tin with gold are subjected to distilla- lion, the copper and tin distil first (Compt.
What to read after Introduction to the Rarer Elements?
You can find similar books in the "Read Also" column, or choose other free books by Philip Embury Browning to read onlineMoreLess
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