you need
  • - copper sulfate;
  • - water;
  • - glass;
  • - thread;
  • - gauze or filter paper;
  • - sand bath;
  • - spoon for stirring;
  • - ceramic tiles;
  • - Petri dish or glass cover.
Guide
1
Create a saturated solution of copper sulphate.In 200 ml water of 20 ° C when required not less than 72 g CuSO (4).The small salt crystals attach to the string and lower the seed in a solution.Cover container with gauze or filter paper.Leave the solution to evaporate slowly at room temperature.This method to grow a crystal rather long, it can take weeks or even months.
2
With the increase in temperature of the water increases the solubility of copper sulfate.But since 80oC it does not change much.Pour 300 ml of water in a large glass, add 200 g of copper sulfate, put on a sand ba
th is heated.Occasionally stir the solution until all the salt has dissolved.
3
Remove the glass sand bath, put on the tiles and let the solution cool.Seeded - copper sulphate crystals on a string.The seed can be dissolved, but it does not matter.The bulk of the copper sulphate precipitates.
4
Remove the string from the solution, repeat the procedure.Reheated glass on the sand bath until the precipitate dissolved.Turn off the heat, cover with a glass petri dish or a glass lid, wait for a while.
5
Make the solution seeded with crystals, glass cover and leave overnight.In the morning on a thread formed crystal 5 cm. This is a quick way to grow a crystal of copper sulfate.
6
A quick method of seed does not matter, you can even omit the "empty" string.Remaining after the experience of using the solution for a slow growing large crystal.