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Why is it physical change if the steel wool turned the black pot shiny silver?
Wiki User
∙ 11y ago
Physical change: the steel wool only changes the black pot's shape and in doing so reveals another color in the pot or the color of the substance that the pot is made from; it would still be the same thing but there would be all the parts of the pot, just it would be in different pieces.
Wiki User
∙ 14y ago
Wiki User
∙ 11y agoYes it would be a physical change as the steel wool would be removing the impurities from the surface of the pot revealing the untarnished surface below. No chemical change will have taken place.
Wiki User
∙ 10y agoPhysical, the friction removes the dullness
Wiki User
∙ 13y agoThe steel wool is removing oxides or physical "crud" that are on the metal, but not chemically part of the metal.
Wiki User
∙ 14y agoPhysical.
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When silver coins are found in ancient shipwreck's they are coated with a black crust What question could you decide whether the silver underwent a chemical or physical change?
You would need to know if the silver underwent change that left the silver as it was originally, (in this case, having a black substance attach to it) or a change that made the silver into a new substance (like tarnishing). If the silver is still the same before and after the change, it was a physical change. If the substance is changed into a different substance after the change, it is a chemical change.
Is silver tarnishing a physical change?
No, it is a chemical change. The tarnish seen on silver is silver sulfide which formed by the silver reacting from small amounts of hydrogen sulfide in the air. So silver sulfide has been created by a chemical reaction.
Why is silver jewelry tarnishing a chemical change?
Because it is a reaction on the silver surface between silver and hydrogen sulphide (H2S); the result is the silver sulphide (Ag2S), a black compound.
What change in color is observed when silver chloride is left exposed to sunlight. What type of chemical reaction is this?
This is a photochemical reaction of decomposition: silver (black) is released.
If you put a banana in a warm cupboard for a week will it turn black and will it be chemical or physical change?
If you put a banana in a warm cupboard for a week, the likelyhood of it turning black is very high. This is a chemical change, as it is caused by the internal decomposition (breaking down) of the sugars contained by the fruit. Please note for future that a physical change is in nearly always a change in state, including disolvsion in a solvent.
When silver coins are found in ancient shipwreck's they are coated with a black crust What question could you decide whether the silver underwent a chemical or physical change?
You would need to know if the silver underwent change that left the silver as it was originally, (in this case, having a black substance attach to it) or a change that made the silver into a new substance (like tarnishing). If the silver is still the same before and after the change, it was a physical change. If the substance is changed into a different substance after the change, it is a chemical change.
Is black crust a physical or chemical change?
Chemical, the black spots are the compound silver sulfide.
Is black tea a physical change or chemical change?
physical change
Is a silver teapot turning black a chemical or physical change?
It is a chemical change but it can be reversed since that cahnge is only on the surface. It is merely an oxidization that occurs when silver is exposed to oxygen and has no contact with oil (which blocks the pores of the metal from reacting with oxygen).
Is silver tarnishing a physical change?
No, it is a chemical change. The tarnish seen on silver is silver sulfide which formed by the silver reacting from small amounts of hydrogen sulfide in the air. So silver sulfide has been created by a chemical reaction.
Black smoke from candle physical change or chemical change?
chemical change Madison and Kayla were here ;)
What is the physical description of silver?
Silvery is white, but often with a black tarnish. Has no odor a texture of soft.
When glass turns black from fire is it a physical or chemical change?
chemical
Should you polish an old silver dollar?
You should never polish old coins, even if they have turned dark or black.
A shiny black solid was heated and formed a purple vapour which on cooling became a black solid again Is this a physical or chemical reaction and explain?
This is a physical change. The solid is Iodine, which sublimes on heating to form gaseous Iodine. When cooled, it sublimes again to form solid Iodine. Since this change is only the change of physical states, and since there's no change in the chemical structure of Iodine, this is a physical change.
Can the flaxen gene affect a true black horse?
They can only be a carrier. Flaxen does not change black, just as silver does not change red. It can be hidden on a black horse and passed to it's offspring.
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.
