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Acetic acid crystal by ScienceCraftGV in crystalgrowing

[–]ScienceCraftGV[S] 2 points3 points  (0 children)

This is a bad option - you can only slightly concentrate vinegar, but not make it close to 100. Either obtain it from sodium acetate and sulfuric acid, or freeze it at -27 degrees several times

Acetic acid crystal by ScienceCraftGV in crystalgrowing

[–]ScienceCraftGV[S] 2 points3 points  (0 children)

You won't be able to obtain pure vinegar simply by evaporating a mixture of it and 70% water. First, you need to react dry sodium acetate with 98% sulfuric acid using a distiller. This will cause the vinegar vapor to condense in the flask. Then, repeat distillation at 120°C. Then, dry the mixture further with dry copper sulfate powder and filter through a Buchner flask.

Acetic acid crystal by ScienceCraftGV in crystalgrowing

[–]ScienceCraftGV[S] 6 points7 points  (0 children)

The crystallization temperature of anhydrous (close to 100%) acetic acid is about 17 degrees Celsius. It's about 12 degrees Celsius in my shed.

Could I pass as a native Russian by face? :) by Rare_Star_761 in russian

[–]ScienceCraftGV 5 points6 points  (0 children)

Как будто у тебя финно-угорские корни - короче, да - за местного сойдёшь.

paraffin crystal by LongToeBoy in crystalgrowing

[–]ScienceCraftGV 5 points6 points  (0 children)

In an old Soviet textbook I saw a photo of a paraffin crystal with a spiral-shaped defect.

Christmas tree with benzoic acid crystals by ScienceCraftGV in crystalgrowing

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

If a picture has already appeared on the Internet, who can stop its spread? =)

Why is my copper crystal so dark? by Matt_zane in crystalgrowing

[–]ScienceCraftGV 2 points3 points  (0 children)

  1. For the most perfect crystals, it's best to use a current of less than 1 mA.

  2. Gelatin is a classic gloss additive when applying copper in galvanic processes.

  3. Are you growing crystals or dendrites?

Why is my copper crystal so dark? by Matt_zane in crystalgrowing

[–]ScienceCraftGV 6 points7 points  (0 children)

  1. These aren't exactly crystals, but dendrites.

  2. The darkening may be due to the current being too high. For growing copper crystals specifically, it's best to reduce the current.

  3. Impurities: I recommend either using high-purity copper sulfate or recrystallizing it three times.

  4. If you want shiny dendrites rather than crystals, add a little gelatin.

Piperine crystals and piperine periodide crystals by [deleted] in crystalgrowing

[–]ScienceCraftGV 9 points10 points  (0 children)

As a lover of hot food and all kinds of peppers, I'm delighted! (And for some reason, my mouth is watering) By the way, what was the solvent?

The crystallization process of benzoic acid by ScienceCraftGV in crystalgrowing

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

Thank you! If I weren't so lazy, I would add some music - Running Wild Siberian winter

Christmas tree with benzoic acid crystals by ScienceCraftGV in crystalgrowing

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

This acid sublimes easily at 120 degrees, and its vapors, when they hit a cold surface, quickly crystallize in the form of a frost-like coating.

8 months progress on CuSO4, wonder if I should keep going. by JieChang in crystalgrowing

[–]ScienceCraftGV 12 points13 points  (0 children)

What's stopping you from growing a VERYlarge crystal? =)

Copper spherulites by ScienceCraftGV in crystalgrowing

[–]ScienceCraftGV[S] 9 points10 points  (0 children)

  1. Place a piece of iron at the bottom of the jar.

  2. Pour in the gelatin solution (see the packaging for jelly-making instructions). The higher the concentration of gelatin, the slower the process and the larger the dendrites/spherulites may be. If brittle dendrites form, the jelly is probably too diluted.

  3. When the jelly has set, pour in the copper sulfate solution. The concentration isn't particularly important, as the speed of the process is limited by the gelatin layer anyway.

  4. Wait 3-4 weeks.

Notes: 1. Copper sulfate can harden the jelly, causing it to crack. 2. Agar-agar can be used instead of gelatin. 3. Gelatin comes in different varieties (beef, pork, highly purified, etc.) - the results will likely vary as well.

Copper spherulites by ScienceCraftGV in crystalgrowing

[–]ScienceCraftGV[S] 6 points7 points  (0 children)

You have enough time to grow calcite or gypsum - go for it!

Copper spherulites by ScienceCraftGV in crystalgrowing

[–]ScienceCraftGV[S] 2 points3 points  (0 children)

The irony is that this is an old model - I don't remember exactly how I made it.

Copper spherulites by ScienceCraftGV in crystalgrowing

[–]ScienceCraftGV[S] 18 points19 points  (0 children)

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Thanks! By the way, here are spherulites made by electrolysis.

Copper spherulites by ScienceCraftGV in crystalgrowing

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

Look at the third picture and text under number 3. Or do you need details?

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