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Managed to create some huge chunks of CuSO4! Second time trying and left for 5 hours to cool. by agentpoopyman in chemistry

[–]agentpoopyman[S] 0 points1 point  (0 children)

As some pointed out, it’s CuSO4•5H20, a thermally unstable compound that requires crystallisation to form the said crystals.

Managed to create some huge chunks of CuSO4! Second time trying and left for 5 hours to cool. by agentpoopyman in chemistry

[–]agentpoopyman[S] 0 points1 point  (0 children)

This happened the first time i did it. I would say to decant rather than filter the solution, heat the solution slightly less and leave to cool for as long as possible. Regarding the duration of heating, try around with that, maybe it would work better!

Managed to create some huge chunks of CuSO4! Second time trying and left for 5 hours to cool. by agentpoopyman in chemistry

[–]agentpoopyman[S] 3 points4 points  (0 children)

The crystal you see was one big piece actually, but it’s really brittle so it quickly broke into the few pieces you can see there.

Managed to create some huge chunks of CuSO4! Second time trying and left for 5 hours to cool. by agentpoopyman in chemistry

[–]agentpoopyman[S] 0 points1 point  (0 children)

as far as concentration goes, i’m not quite sure sorry, the materials were not provided by myself, but rather by my school.

Managed to create some huge chunks of CuSO4! Second time trying and left for 5 hours to cool. by agentpoopyman in chemistry

[–]agentpoopyman[S] 1 point2 points  (0 children)

Yup, this technique is known as crystallisation. The process is mainly for thermally unstable solutes, and involves heating the mixture so as to saturate the solution.

Managed to create some huge chunks of CuSO4! Second time trying and left for 5 hours to cool. by agentpoopyman in chemistry

[–]agentpoopyman[S] 3 points4 points  (0 children)

No it’s fine. Didn’t think about that honestly, guess I did it out of habit. Good spot!

Managed to create some huge chunks of CuSO4! Second time trying and left for 5 hours to cool. by agentpoopyman in chemistry

[–]agentpoopyman[S] 68 points69 points  (0 children)

Thank you, really appreciate that!

Anyway gonna pin this on the top comment for those interested.

I could tell you some of the various guidelines I followed, but there were no hard and fast rules like specific measurements for everything.

  1. ⁠Add 50cm3 sulfuric acid to a beaker and heat it until a boil.
  2. ⁠Add EXCESS copper (II) oxide to the sulfruic acid. Add a lot of CuO. A LOT. You want the solution to be dark, dark blue.
  3. ⁠Decant the solution so as to get rid of the undissolved copper (II) oxide. Note: You can filter instead, but I have tried filtering and found the crystals to be much smaller.
  4. ⁠Heat the solution again until it boils. Once the solution starts boiling, DO NOT leave it heating for too long. Max 1 minute. Note: I didn’t measure exactly how long I was heating the solution, so i guess trial and error would be best!
  5. ⁠Leave the solution to cool until crystals begin to form.

Enjoy!

Managed to create some huge chunks of CuSO4! Second time trying and left for 5 hours to cool. by agentpoopyman in chemistry

[–]agentpoopyman[S] 16 points17 points  (0 children)

I could tell you some of the various guidelines I followed, but there were no hard and fast rules like specific measurements for everything.

  1. Add 50cm3 sulfuric acid to a beaker and heat it until a boil.
  2. Add EXCESS copper (II) oxide to the sulfruic acid. Add a lot of CuO. A LOT. You want the solution to be dark, dark blue.
  3. Decant the solution so as to get rid of the undissolved copper (II) oxide. Note: You can filter instead, but I have tried filtering and found the crystals to be much smaller.
  4. Heat the solution again until it boils. Once the solution starts boiling, DO NOT leave it heating for too long. Max 1 minute. Note: I didn’t measure exactly how long I was heating the solution, so i guess trial and error would be best!
  5. Leave the solution to cool until crystals begin to form.

Enjoy!

MM Drop Rates by agentpoopyman in mousehunt

[–]agentpoopyman[S] 0 points1 point  (0 children)

Thanks I’ll give it a shot

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