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According to the Hand book of Chemistry and Physics, on page 439 it states that sulfates (SO4) can create a gray patina Cu2SO4 on copper. H2S gas can mix with condensate on a copper water line and form sulfuric acid (H2SO4) which can then react with copper to turn it gray.
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What are the sing of chemical change?
Signs of chemical change are when a substance changes into a new substance. Like Paper being burned turns into gray powder. That is a chemical change.
Is an copper a mixture or substance?
copper is a substance
When copper turns green when exposed to the environment a physical or chemical change?
First, copper doesn't "turn green," it reacts with oxygen in the air to form copper oxide. This is a chemical change, because copper oxide is a substance that was not there before.
Is the dark substance on copper after heating a new substance?
The darks substance is copper oxide, formed when the copper reacts with atmospheric oxygen.
Is copper is a pure substance?
Yes, copper is an element, which is a pure substance.
Is copper substance or mixture?
it is substance
Is copper wire a pure substance mechanical mixture or a solution?
Copper wire is a pure substance, as it is made entirely of copper atoms.
Is copper wire mixture or substance?
Copper wire is a substance because it is made up of a single type of material, which is copper. It is not a mixture of different substances.
Is copper a pure substance or a mixture?
Copper is a pure substance.
Is copper plastic substance?
Copper is a metal.
What starts black and turns red become gray?
the gray hair
Is copper when it turns green in the air a chemical change?
The green color on copper when it oxidizes in the air is a physical change, not a chemical change. The process is primarily due to the formation of a layer of copper oxide on the surface of the copper, which alters the appearance without changing the chemical composition of the copper itself.
