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crystal grower
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Actually, the NiSO4 doesn't form pentahydrate or trihydrate, or did you mean CuSO4?
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The Volatile Chemist
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For some reason I assumed those photos were of the copper(II) sulfate trihydrate preparation, didn't see that they were of a nickel salt.
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crystal grower
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Ok , never mind  .These are the crystals of copper(II) sulfate trihydrate and
pentahydrate (from article http://chem.pieceofscience.com/?p=1485):
 
[Edited on 18-5-2016 by crystal grower]
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aga
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Now that bigger picture, he'en mighty purdy.
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Hegi
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The photo of copper(II) formate tetrahydrate was added to the article - Copper(II) formate preparation  This one is recrystallized product. I
observed that supersaturated solution is formed using this procedure.
<img src="http://chem.pieceofscience.com/wp-content/uploads/2016/05/copper-formate.png" alt="copper formate" style="width:900px;height:600px;">
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Hegi
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Hi chemists,
it was a busy month for me and my colleague but still - we posted a few new articles and also revised the old ones. We hope that you´ll find them
useful or at least interesting.
Syntheses:
Cobalt metal preparation (2 ways) - Reducing cobalt(II, III) oxide with hydrogen and double replacement reaction are used for cobalt metal
preparation.
Boric acid preparation - The article contains also trimethylborate preparation.
Copper(II) oxalate complex hydrates - A nice demonstration on how can hydrates differ in their crystal forms.
Silver nitrate preparation - A simple procedure starting with a silver ingot and pure nitric acid. Recrystallization recquries a lot of patience.
Minerals:
Halite - pretty basic stuff but did you know that this mineral was the first to be studied for its crystals structure?
Grossular - my own finding  here in Slovakia quarry. The crystal is
well-shaped and is over 4 mm in diameter.
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Velzee
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Woah, beautiful!
Check out the ScienceMadness Wiki: http://www.sciencemadness.org/smwiki/index.php/Main_Page
"All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident."
—Arthur Schopenhauer
"¡Vivá Cristo Rey!"
—Saint José Sánchez del Río |
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Hegi
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We´re back
Hi everyone!
I just want to inform you that we´ve got back together and after almost two years of inactivity we are going to continue posting and keep the page
alive.
I hope you will like changes that are going to be made and the page content as well!
If you have any ideas of synthesis that might interest you, please write them down and we will try our best!
Our webpage has been shut down forever cause nobody was willing to contribute. Shame on you all!!!
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aga
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Yay !
Happy days !
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Hegi
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Hi aqa! Hope you will enjoy new posts!
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aga
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Quote: Originally posted by Hegi  | | If you have any ideas of synthesis that might interest you, please write them down and we will try our best! |
Trichloroacetic acid, Vogel, page 247.
I found a slightly less terse description in another paper somewhere. Will try to find it again.
The chloral hydrate step needs to be Cold during the chlorination step or there is no solid precipitate.
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Hegi
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| Quote: Originally posted by aga | | Quote: Originally posted by Hegi | | If you have any ideas of synthesis that might interest you, please write them down and we will try our best! |
Trichloroacetic acid, Vogel, page 247.
I found a slightly less terse description in another paper somewhere. Will try to find it again.
The chloral hydrate step needs to be Cold during the chlorination step or there is no solid precipitate. |
Sure I will be glad to perform the synthesis. However, at the time, I do not have access to chloralhydrate. Maby if someone is able to provide few
grams I will do it.
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aga
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I remember reading that it is prepared by chlorinating cold ethanol, which creates a white precipitate, which is then reacted with conc sulphuric
acid.
Can't find the paper/book at the mo. Will keep looking.
Edit:
Found it in Cohen "Practical Organic Chemistry" (in the library) page 99.
TCA is immediately after it.
[Edited on 13-4-2018 by aga]
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Hegi
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| Quote: Originally posted by aga | I remember reading that it is prepared by chlorinating cold ethanol, which creates a white precipitate, which is then reacted with conc sulphuric
acid.
Can't find the paper/book at the mo. Will keep looking.
Edit:
Found it in Cohen "Practical Organic Chemistry" (in the library) page 99.
TCA is immediately after it.
[Edited on 13-4-2018 by aga] |
I would rather not work with elemental chlorine. Did it twice, did not go well.. .)
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aga
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Really ?
I'm nowhere near as accomplished as your distinguished selves, yet i found Cl2 quite easy to work with.
Oh well, guess i'll have to keep trichloroacetic acid on my "TODO" list.
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Hegi
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The webapge has been moved to a new domain PIECEOFSCIENCE.COM from now!
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j_sum1
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I haven't visited for a while. I had forgotten how lovely these photos are.
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crystal grower
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Thanks!
I've just noticed you have a YT channel, will have to take close look at it today.
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crystal grower
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http://pieceofscience.com/world-of-crystals/
I've made a little "gallery" article if someone's interested.
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The Volatile Chemist
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Great looking website! Just enjoyed going through your more recent posts.
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Hegi
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Thanks a lot. We are preparing more articles.. and projects, si we hope it will amaze you as well.
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crystal grower
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Cobalt sulfate
I've experimented a little with CoSO4. These are crystal of Cobalt(II) sulfate hexahydrate crystallized from dilute sulfuric acid. They are really
similiar to those of β-polymorph of NiSO4*6H2O, which makes me wondering if there aren't two polymorphs of CoSO4*6H2O too. (There is very little
information I was able to find about CoSO4 hydrates properties). I'll try different concentrations of H2SO4 to find out if different crystals will
grow.
Here's an article I wrote so far If you're interested:
http://pieceofscience.com/cobalt-sulfate/
[Edited on 15-5-2018 by crystal grower]
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Hegi
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sodium thioantimonate
here you go guys, sodium thioantimonate from natural antimonite .) SODIUM THIOANTIMONATE SYNTHESIS
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Hegi
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We posted a new article on hydroiodic and iodic acid preparation, check it! IODINE ACIDS
[Edited on 6-6-2018 by Hegi]
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weilawei
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"You do not have permission to preview drafts."
Edit: It works from the main site. Nice writeup!
[Edited on 6-6-2018 by weilawei]
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