gold is a very stable metal, which is not affected in general environment. The chemical properties of gold are quite stable. Only industrial aqua regia can dissolve it. Gold jewelry may be dark after wearing for a long time. At this time, it will shine as new as soon as it is brought to the store
extended data
maintenance method:
1. Gold is soft and easy to deform, so do not pull necklaces and other accessories to avoid deformation. When it is not worn for a long time, it should be wrapped with flannel cloth and put into the jewelry box to avoid friction and damage with other jewelry
2. Chemicals such as detergents and disinfectants will change the color of gold. Therefore, gold ornaments should be removed before cleaning and swimming to avoid chemical changes on the surface
3. Pure gold jewelry should avoid direct contact with perfume, hair gel and other cosmetics. When encountering cosmetics containing mercury and lead, chemical reactions will occur, which will easily lead to white spots on the surface of gold jewelry. At this time, you can restore the original color as long as you bake it under the alcohol lamp for a while. If it cannot be solved, you can take it to the gold and silver jewelry store for professional jewelry care
4. Dirt on the surface of gold jewelry will make the color dim. At this time, the developer powder for developing photos can be mixed with 30-40-c warm water to make a developing solution, and then diluted with one time of water. Put the gold jewelry with dirt in it for 4-6 minutes, then use a soft brush to remove the dirt, and rinse it with water for several times. If you dip it in nail polish with a fine cloth, the gold jewelry will be brighter
because gold has stable chemical properties and strong corrosion resistance, it does not react with oxygen in the air even at high temperature. Although gold itself is not corroded, it has very strong chemical affinity with sulfide and is easy to absorb hydrogen sulfide acid gas in the air. The surface appears dark colors such as orange and brownish red. Therefore, in daily life, We should avoid contact with mercury containing cosmetics and some chemicals when wearing gold jewelry
extended data
Gold: gold is the elemental form of chemical element gold (chemical element symbol AU), which is a soft, golden yellow, corrosion-resistant precious metal. Gold is one of the rare, precious and highly valued metals
Gold maintenance methods: 1. Gold is soft, so when wearing gold jewelry, avoid pulling and squeezing the gold to avoid deformation
2. When wearing gold jewelry, you should not touch cosmetics and other products
3. Use salt and vinegar to mix into a cleaning agent, and use it to wipe the pure gold jewelry, so that the gold will last for a long time
4. If there is a black silver film on the gold surface, use 2G of salt, 7g of baking soda, 8g of bleaching powder and 60ml of water to prepare a "gold ware cleaner". Put the gold jewelry into a bowl and pour the cleaner. After 2 hours, take out the gold jewelry, rinse it with water (preferably not hard water), bury it in wood chips and dry it, and then wipe it with a soft cloth
5. When keeping the gold, wrap it with flannel cloth and put it into the jewelry box to avoid mutual friction and damage
Gold is stable in nature and not afraid of water, because it is a beautiful golden yellow metal with high density, low hardness, high melting point and boiling point. It does not oxidize with oxygen at any temperature, nor is it soluble in hydrochloric acid, sulfuric acid, nitric acid and other separate acids. It does not change even under the action of moisture, air, acids, alkalis, salts and other substances
it is only necessary to pay attention not to touch the cosmetics when wearing them everyday. If the gold contacts the mercury in the cosmetics, the gold surface will turn white. When swimming, take off the gold ornaments to avoid chemical changes on the surface after touching the seawater or pool water. The chemical substances of the detergent will also change the color of the gold. Therefore, take off the gold ornaments before cleaning.. After wearing, the gold ornaments often lose luster due to dirt and dust. At this time, just put the gold ornaments in a neutral detergent, soak them in warm water and clean them, then take them out and wipe them dry
It can be stained with water. Gold will not be rusted by water! Gold is the elemental form of the chemical element gold (chemical element symbol AU). It is a soft, golden yellow, corrosion-resistant precious metal
expansion: Gold maintenance method
gold jewelry is stored separately in jewelry boxes or soft leather pockets
when doing manual work, remove the gold jewelry
when wearing gold jewelry, do not let the jewelry contact bleach or other irritating chemicals. Although they
do not damage gold, chemicals may discolor delicate gemstones
clean gold regularly, just like cleaning other valuable jewelry. Please use a special jewelry cleaner or immerse it in mild soapy water, and then gently wipe it with a soft cloth
after a certain period of time, the platinum jewelry will be sent for professional cleaning. The gold jewelry inlaid with gems should be cleaned professionally every 6 months
Gold is not afraid of water. Gold has stable chemical properties and strong corrosion resistance. It does not react with oxygen in the air even at high temperature (except for pure oxygen under certain conditions). Gold does not react with oxygen and sulfur at high temperature. It has very stable chemical properties and is stronger than silver (silver oxidizes to silver oxide at 1500 ° C, and gold does not react with oxygen even at 3000 ° C). However, if this happens, gold will be oxidized, (1. It is located at the bottom of the river and is rubbed by the sand and stone at the bottom of the river for many years. 2. When the river freezes in winter, the water close to the bottom of the river is liquid, and the oxygen pressure in the water is several times higher than that when it is not frozen. 3. The river freezes and melts year after year. 4. The oxygen at the bottom of the river is relatively pure. 2, (4000 ℃, high pressure, catalyst), insoluble in a single strong acid such as hydrochloric acid, nitric acid and sulfuric acid, The mixed acid (i.e., aqua regia) dissolved only in hydrochloric acid and nitric acid generates chloroauric acid h [AuCl4]; In the presence of oxygen at room temperature, gold can be dissolved in a solution containing potassium cyanide or sodium cyanide to form a stable complex m [Au (CN) 2]; Gold can also be dissolved in a solution containing thiourea; It is also dissolved in an acidic solution containing chlorine gas. Gold does not interact with alkali solution, but can form naauo2 with sodium peroxide in the molten state. The valence of gold is - 1, - 2, 1, 2, 3, 5, 7, etc., the oxide is gold oxide au2o3, and the chloride is gold trichloride aucl3.
Gold can be dipped in water
gold is a very stable metal, which is not affected in general environment. The chemical properties of gold are quite stable. Only industrial aqua regia can dissolve it. Gold jewelry may be dark after wearing for a long time. At this time, it will shine as new as soon as it is brought to the store
extended data
maintenance method:
1. Gold is soft and easy to deform, so do not pull necklaces and other accessories to avoid deformation. When it is not worn for a long time, it should be wrapped with flannel cloth and put into the jewelry box to avoid friction and damage with other jewelry
2. Chemicals such as detergents and disinfectants will change the color of gold. Therefore, gold ornaments should be removed before cleaning and swimming to avoid chemical changes on the surface
3. Pure gold jewelry should avoid direct contact with perfume, hair gel and other cosmetics. When encountering cosmetics containing mercury and lead, chemical reactions will occur, which will easily lead to white spots on the surface of gold jewelry. At this time, you can restore the original color as long as you bake it under the alcohol lamp for a while. If it cannot be solved, you can take it to the gold and silver jewelry store for professional jewelry care
4. Dirt on the surface of gold jewelry will make the color dim. At this time, the developer powder for developing photos can be mixed with 30-40-c warm water to make a developing solution, and then diluted with one time of water. Put the gold jewelry with dirt in it for 4-6 minutes, then use a soft brush to remove the dirt, and rinse it with water for several times. If you dip it in nail polish with a fine cloth, the gold jewelry will be brighter
reference: Baidu Encyclopedia - Gold
Gold can be dipped in water
because gold has stable chemical properties and strong corrosion resistance, it does not react with oxygen in the air even at high temperature. Although gold itself is not corroded, it has very strong chemical affinity with sulfide and is easy to absorb hydrogen sulfide acid gas in the air. The surface appears dark colors such as orange and brownish red. Therefore, in daily life, We should avoid contact with mercury containing cosmetics and some chemicals when wearing gold jewelry
extended data
Gold: gold is the elemental form of chemical element gold (chemical element symbol AU), which is a soft, golden yellow, corrosion-resistant precious metal. Gold is one of the rare, precious and highly valued metals
Gold maintenance methods: 1. Gold is soft, so when wearing gold jewelry, avoid pulling and squeezing the gold to avoid deformation
2. When wearing gold jewelry, you should not touch cosmetics and other products
3. Use salt and vinegar to mix into a cleaning agent, and use it to wipe the pure gold jewelry, so that the gold will last for a long time
4. If there is a black silver film on the gold surface, use 2G of salt, 7g of baking soda, 8g of bleaching powder and 60ml of water to prepare a "gold ware cleaner". Put the gold jewelry into a bowl and pour the cleaner. After 2 hours, take out the gold jewelry, rinse it with water (preferably not hard water), bury it in wood chips and dry it, and then wipe it with a soft cloth
5. When keeping the gold, wrap it with flannel cloth and put it into the jewelry box to avoid mutual friction and damage
reference: Baidu Encyclopedia, gold
Gold is stable in nature and not afraid of water, because it is a beautiful golden yellow metal with high density, low hardness, high melting point and boiling point. It does not oxidize with oxygen at any temperature, nor is it soluble in hydrochloric acid, sulfuric acid, nitric acid and other separate acids. It does not change even under the action of moisture, air, acids, alkalis, salts and other substances
it is only necessary to pay attention not to touch the cosmetics when wearing them everyday. If the gold contacts the mercury in the cosmetics, the gold surface will turn white. When swimming, take off the gold ornaments to avoid chemical changes on the surface after touching the seawater or pool water. The chemical substances of the detergent will also change the color of the gold. Therefore, take off the gold ornaments before cleaning.. After wearing, the gold ornaments often lose luster due to dirt and dust. At this time, just put the gold ornaments in a neutral detergent, soak them in warm water and clean them, then take them out and wipe them dry
It can be stained with water. Gold will not be rusted by water! Gold is the elemental form of the chemical element gold (chemical element symbol AU). It is a soft, golden yellow, corrosion-resistant precious metal
expansion: Gold maintenance method
gold jewelry is stored separately in jewelry boxes or soft leather pockets
when doing manual work, remove the gold jewelry
when wearing gold jewelry, do not let the jewelry contact bleach or other irritating chemicals. Although they
do not damage gold, chemicals may discolor delicate gemstones
clean gold regularly, just like cleaning other valuable jewelry. Please use a special jewelry cleaner or immerse it in mild soapy water, and then gently wipe it with a soft cloth
after a certain period of time, the platinum jewelry will be sent for professional cleaning. The gold jewelry inlaid with gems should be cleaned professionally every 6 months
Gold is not afraid of water. Gold has stable chemical properties and strong corrosion resistance. It does not react with oxygen in the air even at high temperature (except for pure oxygen under certain conditions). Gold does not react with oxygen and sulfur at high temperature. It has very stable chemical properties and is stronger than silver (silver oxidizes to silver oxide at 1500 ° C, and gold does not react with oxygen even at 3000 ° C). However, if this happens, gold will be oxidized, (1. It is located at the bottom of the river and is rubbed by the sand and stone at the bottom of the river for many years. 2. When the river freezes in winter, the water close to the bottom of the river is liquid, and the oxygen pressure in the water is several times higher than that when it is not frozen. 3. The river freezes and melts year after year. 4. The oxygen at the bottom of the river is relatively pure. 2, (4000 ℃, high pressure, catalyst), insoluble in a single strong acid such as hydrochloric acid, nitric acid and sulfuric acid, The mixed acid (i.e., aqua regia) dissolved only in hydrochloric acid and nitric acid generates chloroauric acid h [AuCl4]; In the presence of oxygen at room temperature, gold can be dissolved in a solution containing potassium cyanide or sodium cyanide to form a stable complex m [Au (CN) 2]; Gold can also be dissolved in a solution containing thiourea; It is also dissolved in an acidic solution containing chlorine gas. Gold does not interact with alkali solution, but can form naauo2 with sodium peroxide in the molten state. The valence of gold is - 1, - 2, 1, 2, 3, 5, 7, etc., the oxide is gold oxide au2o3, and the chloride is gold trichloride aucl3.