“Сopper tree” experiment
How to grow a copper tree on paper
Wear protective gloves and glasses.
Warning! Only under adults supervision.
Reagents and equipment:
- 5 ml 10% copper(II) sulfate solution;
- grain of zinc;
- filter paper;
- Petri dish.
Place the filter paper in the Petri dish and pour the copper(II) sulfate solution onto it so that the paper becomes completely soaked. Then place the grain of zinc on top, press it against the filter paper and cover with a lid, so the liquid does not evaporate. 5 hours later a copper pattern will appear on the paper.
The grain of zinc is located on the surface of the paper with the copper(II) sulfate solution and so the growth of crystals of metallic copper does not take place on the grain, but in the place of their contact. The copper that forms is a “continuation” of the grain of zinc, and is negatively charged. Copper ions are drawn to it and are reduced.