buy lead and nickel free jewelry wholesale What kind of experiments can be made to get the gold back color

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buy lead and nickel free jewelry wholesale Thank you for your main thing I want is the common and easy experiments in the experimental chemistry or the common phenomenon in life, such as the gold retreating color or something

6 thoughts on “buy lead and nickel free jewelry wholesale What kind of experiments can be made to get the gold back color”

  1. Lionel

    wholesale beach jewelry Best Answer-Questioner 2006-09-10 22:06:29 Select
    In many people found that they have changed or fade after we wear gold jewelry for a while. So go to the store to negotiate or go to the Consumer Association to complain. However, the defendant's gold jewelry is not the insufficient color of gold jewelry, but for other reasons.

    The discoloration or fading of gold jewelry is closely related to the human sweat. 99%of human sweats are water, and about 1%are waste and harmful substances in the human body, such as: chloride, lactic acid, urea, urea, ammonia, etc. After contacting the silver and copper in gold jewelry in gold jewelry, chemical reactions will produce chemical reactions, produce chlorine silver and copper sulfide, and present dark black chemical salt. This kind of chemical salt often falls from gold jewelry, polluting the wearer's The skin leaves a very obvious black stain on the skin.

    The cosmetics have become one of the indispensable "characters" in people's lives. If you apply it on the skin of the gold jewelry, it will undoubtedly provide opportunities for cosmetics containing chemicals and the golden jewelry that is most afraid of chemical erosion, and the results can be imagined.

    The cosmetics also contain some fine hard particles, which can form another type of dirt, thereby wear golden jewelry. The regional environmental factors may also make gold jewelry lose their bright color. For example: dry areas, the air contains a lot of fine dust. After the human body is contaminated, it will form a "human sandpaper". It can wear gold jewelry to erode extremely slight debris and local black stains. It is worth mentioning that the refreshing powder or moisturizing cream also contains similar particles, which will also make gold jewelry barely like the above.

  2. Cecilia

    wholesale costume jewelry for resale The discoloration or fading of gold jewelry is closely related to human sweat. 99 % of human sweats are water, and about 1 % are waste and harmful substances in the human body, such as chlorine substitutes, lactic acid, urea ammonia, etc. After contacting the silver and copper in gold jewelry in gold jewelry, chemical reactions will occur, producing silver chloride and copper sulfide, and showing dark black chemical salt. These chemical salts are often dropped from gold jewelry, contaminating the skin of the wearer, leaving very obvious black stains on the skin. On the skin of the jewelry, the opportunity of cosmetics containing chemicals and the golden jewelry that is most afraid of chemical erosion will be discussed, causing discoloration. Some cosmetics also contain some fine hard particles, which can form another type of dirt, thereby wear gold jewelry.

  4. Lila

    wholesale jewelry clearwater florida Wang Shui
    1 is mixed with concentrated nitric acid and 3 volume of concentrated hydrochloric acid (strictly speaking, the ratio of the amount of HNO3 and HCL in its mixed acid is 1: 3).
    The principle:
    aU no3- 4H → AU3 NO ↑ 2H2O R R 3Cl- → AUCL3
    AU HCL === AUCL3 NO ↑ 2H2O R
    auCl3 HCL === HauCl4 (tetrachloride acid)
    Δ
    2hauCl4 === 2HCl ↑ 3Cl2 ↑ 2AU

  5. Brooke

    wholesale runway jewelry Wang Shui allows gold to integrate into Wang Shui. If you want to turn gold, it is normal.
    You said that the color of the golden legs is actually to make gold and other objects chemically screen, but gold is an inert object, and it is difficult to reflect it. It is necessary to need a strong oxidized object.
    Fluoro, atomic order 9, atomic weight 18.9984032 fluorine is the most lively and most oxidized substance in chemical properties. In addition to 氦, 氖, and 氩, fluoride can be combined with all other elements; Phosphorus, carbon, silicon and other substances can be fiercely condensed at low temperatures; fluoride ions are small, and it is easy to form a stable partial compound with many positive ions; fluoride and hydrocarbons will cause difficulty in controlling rapid reactions.
    Perhaps f can

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