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It's chemical. It's the formation of silver sulfide (AgS), the sulfur coming from food (in certain proteins) or even the air (SO2). Thus, the smart way to remove the blackish stains is /not/ by rubbing them off mechanically, but to reverse the staining process chemically: put the cutlery in some warm water, add tin foil bits (which is actually aluminium, not tin), add some table salt (for conduction) leave it fore some hours and occasionally stir. The AgS will be reverted in a redox reaction into metallic silver while corroding the tin foil. The sulfide will be turned into hydrogen sulfide (H2S), which you might be able to smell (rotten eggs).
What else can I help you with?
When silver tarnishes when it comes in contact with hydrogen sulfide in the air is that physical or chemical property?
The tarnishing of silver when it comes in contact with hydrogen sulfide in the air is a chemical property. This is because a chemical reaction occurs between the silver and the hydrogen sulfide, leading to the formation of a new compound on the surface of the silver.
Is Ag tarnishes physical property or chemical property?
The tarnishing of silver (Ag) is a chemical property because it involves a chemical reaction between silver and sulfur compounds in the air or on the surface of the metal, leading to the formation of a dark layer of silver sulfide on the surface.
Why is it chemical change when a silver fork tarnishes slowly in air?
Tarnishing of a silver fork in air is a chemical change because it involves a reaction between the silver and sulfur-containing compounds in the air to form silver sulfide. This reaction alters the chemical composition of the silver on the surface of the fork, resulting in the formation of a dull, tarnished layer.
Is casting silver in mold a physical change?
Casting silver in a mold is a reversible physical change because the silver can be melted again and reshaped into a different form. The process does not alter the chemical composition of the silver.
Is a silver metallic color of sodium metal a physical or chemical change?
The formation of a silver metallic color on sodium metal is a physical change. This change is due to the reflection of light by the metal's surface, and the silver color is a property change and does not involve a change in the chemical composition of the sodium metal.
Is a silver tarnishes physical or chemical change?
Chemical change
Is a silver tarnishes a chemical or physical change?
Chemical change
Is silver tarnishes a chemical or physical change?
Chemical change
Is silver tarnishing a physical or chemical reaction?
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.
Is tarnishing a physical change?
chemical, e.g. if you have silver, and it tarnishes, the dark spots (the tarnished areas) are actually silver oxide. If it were a physical change, the silver would need to change states of matter. Into gas, liquid or plasma
What is the weathering in which the chemical composition has changed?
It's called chemical weathering/chemical change. Similar to the physical change of matter, except the chemical composition changes causing it to become something completely different. For example: iron turns to rust, silver tarnishes and copper turns green.
Is tarnished silver a physical change or chemical change?
a chemical change
Is silver tarnishing a physical property a physical change a chemical change or a chemical property?
a physical property
Is the tarnishing of a silver bracelet a chemical or physical change?
Chemical change
Is tarnishing silver physical change or chemical?
Chemical Change.--its tarnish!
Is tarnishing silver a physical or chemical change?
Chemical Change.--its tarnish!
Is tarnishing a silver physical or chemical change?
Chemical Change.--its tarnish!
