you need
  • - copper sulfate;
  • - water;
  • - glass;
  • - thread;
  • - gauze or filter paper;
  • - sand bath;
  • - spoon for stirring;
  • - ceramic tiles;
  • - Petri dish or glass cover.
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.
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.
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.
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.
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.
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.