2 thoughts on “Can gold be oxidized by high temperature”

  1. Yes, because the golden ductility is extremely strong. The golden gold can be pulled into 50 miles long, and its ductility makes it easy to cast. It is a good choice for making jewelry. Gold is the strongest in the metal.
    Gold, as a precious metal, has good physical characteristics. "Real Gold is not afraid of fire" is that the chemical stability of gold is very high. It is not easy to chemically react with other materials. You don't have to worry about oxidation and discoloration. Even in the melting state, it will not be oxidized and discolored.
    The expansion information: Gold feature:
    1, color:
    The steam emitted when gold is melted is green; its gold powder is usually brown during the smelting process; A thin piece, it can send green light.
    2, ductility:
    is extremely strong. 1 ounce of gold can be pulled into 50 miles long, and its ductility makes it easy to cast and is a good choice for making jewelry. Gold is the strongest in the metal.
    3, forgedness:
    INO. It can cause extremely thin and easy to roll up. 1 ounce of gold can be hammered to 4 million -foot thick and 100 square feet. The ancients hammed it into thin slices to decorate the temples and the palace. These can explain the strong flexibility and forgedness of gold.
    The chemical properties of gold are stable and have a strong corrosion resistance. In the air, even at high temperatures, it does not respond to oxygen (except for pure oxygen at specific conditions). Sulfur response, chemical properties are very stable, stronger than silver (silver will be oxidized at 1500 degrees to generate silver oxide, and gold does not respond to oxygen even if gold is more than 3000 degrees). N1. Located at the bottom of the river and rubbed the sand and gravel at the bottom of the river for many years. When
    2, when the river is freezing in winter, the water close to the bottom of the river is liquid. n3, the river is frozen and ablation year after year,
    4, the oxygen at the bottom of the river is pure), (4000 degrees, high pressure, catalyst), insoluble in strong acids such as a single hydrochloric acid, nitric acid, sulfuric acid, only only Mixed acid (ie king water) dissolved in hydrochloric acid and nitric acid generates chlorine h [AUCL4];
    The n when aerobic existence at room temperature is soluble in solution containing potassium cyanide or sodium cyanide, forming a stable collateral Compound m [AU (CN) 2]; gold is also soluble in solutions with sulfur pheasant; it is also dissolved in acidic solutions with chlorine gas.
    This does not work with the alkali solution, but when melting state, it can be generated by -1, -2, 1, 2, 5, 7, etc. in Naauo2. Erjin AU2O3, chloride has a trichlot chloride AUCL3.
    In in an acidic medium, chlorine h [AUCL4] or complex M [AU (CN) 2] can be restored to metal zinc (zinc powder or zinc wire), sodium sulfate, and hydraulic crickets, etc. The sulfide of the alkali metal will corrode gold and generate soluble sulfide gold. Exic acids in the soil and metabolites of certain bacteria can also dissolve trace gold.
    This of gold is high, it is difficult to lose the outer electrons into positive ions, and it is not easy to accept electrons into anion. Its chemical properties are stable and the affinity with other elements is weak. Therefore, most of the natural gold state exists in nature.
    The average content of gold in the crust is about 1.1 million % (0.0011 ppm), and the content in seawater is about 1 (0.00001ppm). The change makes gold elements rich into gold mines. The gold ore with general industrial value is 2-3 grams/ton, the rich ore has 5-50 grams/ton, the Fugu mine is 50-500 grams/ton, and the gold is also available.
    The smallest ten grams of single block, the largest dozens of kilograms, and rare large pieces of gold hundreds of kilograms. Because of some dog heads, commonly known as dog head gold, Indian scientists have found two nearly 2.5 tons of dog head gold ; Poverty-stricken ore has industrial mining value at 0.1-1 gram/ton, and the level of selection and smelting technology has industrial mining.
    The pure gold in nature is very small, often including silver, copper, iron, 钯, 铋, platinum, nickel, 碲, selenium, 锇 and other accompanimental elements. Natural gold contains 15%of silver in silver More than 20%of copper are called copper gold ore, with 5-11%of 钯 钯 钯 钯 钯 矿 矿 钯 钯 铋 铋 铋 铋 铋 铋 矿 矿 矿 铋 铋 铋 铋 矿 矿 矿 矿 矿 矿 矿.
    This has a parental sulfur, and is often close to sulfur such as pyroneite, poison sand, square lead ore, and 锑 ore.
    Reference materials Source: Baidu Encyclopedia-Gold
    Reference materials Source: Baidu Encyclopedia-dry 瘪 瘪
    Reference materials Source: Baidu Encyclopedia-瘪
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  2. As a precious metal, gold has good physical characteristics. "Real gold is not afraid of fire" is that the chemical stability of gold is very high. It is not easy to chemically react with other substances. You don't have to worry about oxidation and discoloration. Even in the melting state, it will not be oxidized and discolored. The density is strong and the feel is heavy. Good toughness and ductility, good guidance. Pure gold has gorgeous yellow, but after incorporating other metals, the color changes greatly. For example, gold and copper alloy are dark red, and the silver alloy is light yellow or gray -white. Jin Yi was grinded into powder, which is why Jin is scattered in nature. Pure gold jewelry is also easily worn and reduced.

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