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It is due to the formation of silver sulphide ,as a result of the reaction between silver and hydrogen sulphide in the air.
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∙ 10y ago
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Why silver metal doesn't combine easily with oxygen but silver jwellery tarnishes after some time?
... because polluted air affects silver's top surfaces, over time it will eventually start to rust and peel off. silver is put behind mirrors to reflect while glass prevents it from tarnishing.
Why is chemicals in an anti spot cream react with a silver necklace turning it black helpful?
naturally occurring sulfur oxide causes silver to turn black over time. The concentrated sulfur, about 6% in Spot treatments, just increases the speed of this chemical reaction. Toothpaste with Zinc and silver-cleaner cloth takes care of it.
What time zone is silver formed?
Ummm... not quite sure what you mean, silver can be found all over the world.
What is the formation of black sand in the pacific coast?
Black volcanic rock eroded over time makes black sand.
Do titanium rings turn black over time?
Good Question… If the ring is made up of pure titanium and is good quality then it will not turn black over time. I think you should be aware from whom you are buying your ring. Source :- www.buybluesteel.com
Why do silver coins become black on keeping for long time?
Silver oxidises over time making it look black. Moisture from the human body can speed up this process
Why do silver articles become black after some time when exposed to air?
Sulphur and Nitrogen dioxide and trioxide gases present in the air, as pollutants, react with the surface of the silver to form black compounds such as Silver nitrate and Silver sulphide.
What does it mean when your earrings turn black?
silver will tarnish over time, and that's normal. just clean it occasionally and make it sparkle :)
Does silver change colors?
If we are talking about the element silver than yes it can change colors. The silver may change from a chemical treatment or naturally over time, which is called toning, becoming brown, tan, black, even what is called rainbow toned.
Why do silver coins turn black when kept for a longer period of time?
because of sulphide coating on silver
Why silver metal doesn't combine easily with oxygen but silver jwellery tarnishes after some time?
... because polluted air affects silver's top surfaces, over time it will eventually start to rust and peel off. silver is put behind mirrors to reflect while glass prevents it from tarnishing.
You wore your new silver bracelet in the jacuzzi and it went black why is this?
The chemicals in the jacuzzi water will turn silver to black. Next time, take off your silver jewelry before entering a spa or pool.
What will happen if the silver bromide is kept for some time in sunlight?
The silver ions in the exposed area will be reduced to black metallic silver in a matter of minutes.
Why is chemicals in an anti spot cream react with a silver necklace turning it black helpful?
naturally occurring sulfur oxide causes silver to turn black over time. The concentrated sulfur, about 6% in Spot treatments, just increases the speed of this chemical reaction. Toothpaste with Zinc and silver-cleaner cloth takes care of it.
Does sterling silver change?
Over a long period of time
What is work and how it changes over time?
It changed over time from black and white to color?
Do your lugs get black if you smoke?
Smoking over time will make them black.
