we did an experiment on metal reactivities . the reactions was between three metals copper. magnesium and zinc and with three solutions copper, magnesum and zinc
what caused the formation of the color in the test tube during the reaction? please explain
2007-11-22 06:27:41 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
You need to be a little bit more exact. The solutions didn't contain copper, magnesium, and zinc but salts of these metals.
One of these salts (you should have taken a note of which) was coloured. I expect that its colour disappeared when it was treated with one or more of the metals, and you should have taken a note of that as well.
You might also have noticed some changes in the appearance of some of the metals.
You can't start explaining things until you have properly observed them.
2007-11-22 06:35:51 · answer #1 · answered by Facts Matter 7 · 1⤊ 0⤋
I suppose that you doing these reactions in water.
Cu + H2O = does not react.
Mg + 2H20 = Mg(OH)2 + H2
Magnesium reacts with water creating Magnesium hydroxyde.
Mg(OH)2 + Zn + 2H20 = Mg(Zn(OH)4) + H2
Zn is a element that reacts with strong acids giving Zn (2+) salts (ZnCl2 example) it also reacts with strong bases giving Zn(OH)4 (4-) salts. So change of the color is caused by Chemical compound Magnesium tetrahydroxo Zinkat.
2007-11-22 06:49:28 · answer #2 · answered by Anonymous · 1⤊ 0⤋