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The tarnishing of silver is due to a reaction with hydrogen sulfide. Because the end result of the tarnish is silver sulfide, it is a chemical change.
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Is silver tarnishing a chemical or physical change?
no * * * * * A chemical process.
What about tarnishing of silver is chemical or physical change?
It's a chemical change. A thin layer of silver on the surface reacts with oxygen in the air - to form silver oxide.
What is Zeisel's method?
Zeisel's method is used to estimate the alkoxy linkages in an organic compound. In this method the organic compound containing alkoxy group is treated with hydrogen iodide and the alkyl halide formed is further treated with silver nitrate to precipitate silver iodide In this reaction only hydrogen iodide can be used because it consists of an ionic bond, while HF, HCl, HBr contain covalent bond where an iodide ion is liberated which forms a precipitate with silver nitrate. The silver iodide can be weighed and from its weight the number or alkoxy group can be estimated.
What did Spencer Silver invent?
Silver invented Post-It Notes. He was trained as a chemist.
Can silver be used to make electrical wires?
Silver is used as a low resistance conductive material. Contactors and relays contact points are made of copper and are silver plated to obtain the lowest resistance between the moving contact faces.
