When the product is with oxygen it will be copper oxide CuO. If it is with nitrogen it is copper nitrate.
The chemical reaction is:
4 Cu + O2 = 2 Cu2O
Copper oxide
it is strawberry flavoured yogurt.
You get some CuO and not much else.
Copper sulphate CuSO4
When copper reacts with acetic acid, copper acetate is formed. Copper acetate is a dark greenish-blue colour.
Reactant+Reactant=Product
Copper reacts with the oxygen in the air in a process called oxidation. This occurs in several steps as seen in Kuba Jasinskiβs answer. The reactions occur as the copper atoms give up some electrons (oxidation) to the oxygens (reduction) to create ionic compounds. This is a classic example of what is called a redox (reduction-oxidation) reaction.
Na2Se
An oxide is formed.
chemical
Copper sulphate CuSO4
When copper reacts with acetic acid, copper acetate is formed. Copper acetate is a dark greenish-blue colour.
Copper(II)sulphate and hydrogen.
ZnCl2 and Cu
Copper is corroded in a sodium chloride solution; CuCl2 is formed.
Reactant+Reactant=Product
with water aswell it would become copper carbonate
The darks substance is copper oxide, formed when the copper reacts with atmospheric oxygen.
Copper reacts with the oxygen in the air in a process called oxidation. This occurs in several steps as seen in Kuba Jasinskiβs answer. The reactions occur as the copper atoms give up some electrons (oxidation) to the oxygens (reduction) to create ionic compounds. This is a classic example of what is called a redox (reduction-oxidation) reaction.
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.