How to remove copper from the iron surface and remove copper from the surface of the iron?
And the activity of the iron was stronger than copper, copper color is red, so the wire into the phenomenon of copper sulfate for wire surface with a red substance precipitation, chemical formula is Fe+CuSO 4 =FeSO 4 +Cu; only a small amount of hydrochloric acid containing tubes inserted into the first no phenomenon, insert iron, iron surface bubbles, when the solution into aluminum, no air bubbles because of hydrochloric acid consumption over, but the activity of aluminum than iron, aluminum surface precipitation of metallic iron; can also prove that the reactivity of the three metals;
General life of metal by large-scale exploitation of human is related to metal activity sequence, the stronger the development activities of the later, so the order of iron, aluminum and copper three metallic materials used by human for Cu, Fe, Al. B. (two): Al > Fe > Cu;
The wire surface and produce a small amount of bubbles, aluminum wire surface to produce a large number of bubbles, the surface of copper wire without air bubbles, so the metal activity series of Al > Fe > Cu; (four), experimental results show that the aluminum wire surface without air bubbles, after a few minutes to produce a large number of bubbles, because the surface of compact alumina film the same is true of other metals, so the metal properties should be polished to remove metal, metal oxide on the surface;
