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by Suhail Ahanger

    • Always use test tube holder when using a test tube.

    • Do not touch the test tube immediately after heating.

  1. Make pinholes in the cap of the plastic container using board pin. Make pinholes in the cap of the plastic container using board pin. Make pinholes in the cap of the plastic container using board pin.
    • Make pinholes in the cap of the plastic container using board pin.

  2. Fold the filter paper twice. First fold should give you semi circle shape and second fold gives quarter circle. Note that the second fold will give you four flaps as you try to open it to get a cone. Note that the second fold will give you four flaps as you try to open it to get a cone.
    • Fold the filter paper twice. First fold should give you semi circle shape and second fold gives quarter circle.

    • Note that the second fold will give you four flaps as you try to open it to get a cone.

  3. Separate the flaps such that you get three flaps on one side and one flap on another side. Tape the cone to put three flap side together. Tape the cone to put three flap side together.
    • Separate the flaps such that you get three flaps on one side and one flap on another side.

    • Tape the cone to put three flap side together.

  4. Use the test tube holder by refering to the Test tube stand and holder guide. Pour 5 gram copper sulphate powder into the test tube. Add 7 ml of water using a dropper.
    • Use the test tube holder by refering to the Test tube stand and holder guide.

    • Pour 5 gram copper sulphate powder into the test tube.

    • Add 7 ml of water using a dropper.

  5. Heat the mixture to dissolve the copper sulphate powder. Important: Keep in mind the following two things.
    • Heat the mixture to dissolve the copper sulphate powder.

    • Important: Keep in mind the following two things.

    • Keep the test tube slightly tilted to heat the side walls near bottom.

    • Don't let the flame touch the test tube. Keep the test tube slightly above the flame to avoid black soot formation.

  6. Make sure the powder is completely dissolved. Pour the solution into a plastic container through the prepared filter paper cone.
    • Make sure the powder is completely dissolved.

    • Pour the solution into a plastic container through the prepared filter paper cone.

    • Important: Repeat step 6 and step 7 to make final solution having 10 g copper sulphate and 14 ml water.

  7. The solution will stop dripping through filter paper when the solution touches the cone inside the container. Raise the cone to continue the dripping. Throw away the residue crystals(if any) left inside the cone after filtering.
    • The solution will stop dripping through filter paper when the solution touches the cone inside the container.

    • Raise the cone to continue the dripping.

    • Throw away the residue crystals(if any) left inside the cone after filtering.

  8. Close the container with lid and keep it undisturbed for an overnight. The holes in the cap is to facilitate the evaporation process. The holes in the cap is to facilitate the evaporation process.
    • Close the container with lid and keep it undisturbed for an overnight.

    • The holes in the cap is to facilitate the evaporation process.

  9. After 24 hours you will see some small crystals would have formed at the bottom of the container . After 24 hours you will see some small crystals would have formed at the bottom of the container .
    • After 24 hours you will see some small crystals would have formed at the bottom of the container .

  10. Pour out the solution in a clean container. The small crystals will stay back inside the cone after filtration. The small crystals will stay back inside the cone after filtration.
    • Pour out the solution in a clean container.

    • The small crystals will stay back inside the cone after filtration.

  11. Carefully take out the crystals on  a clean surface. Wash the container thoroughly  which contained the solution. Wash the container thoroughly  which contained the solution.
    • Carefully take out the crystals on a clean surface.

    • Wash the container thoroughly which contained the solution.

  12. Among the crystals formed pick the biggest size and put it back into same container. Also pour back the solution kept in another container. Also pour back the solution kept in another container.
    • Among the crystals formed pick the biggest size and put it back into same container.

    • Also pour back the solution kept in another container.

  13. Close the container with cap again. Keep the container undisturbed and after few days observe the size of the crystal. Keep the container undisturbed and after few days observe the size of the crystal.
    • Close the container with cap again.

    • Keep the container undisturbed and after few days observe the size of the crystal.

  14. It may take one to two weeks to get the significant increment in the size of the crystal. Pour out the solution to take out the final crystal. Pour out the solution to take out the final crystal.
    • It may take one to two weeks to get the significant increment in the size of the crystal.

    • Pour out the solution to take out the final crystal.

  15. Fill the table.
    • Fill the table.

    • Copper sulphate powder not dissolving. Make sure to heat enough to agitate water inside the test tube for proper dissolution.

    • Test tube becomes black. Make sure to hold the test tube at some height from flame.

    • Crystals not formed after 24 hours. Keep the solution isolated from any kind of disturbance.

Vishal Bhatt

Member since: 04/26/2017

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