Nitesh.dodeja
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Copper sulphate crystals and powder
I want to grow copper sulphate crystals as well as powder, how do i do that... Do i leave the copper sulphate solution at different densiities to get
crystals and powder... I have heard if the solution is left at density 1.40-1.42, copper sulphate is obtained as powder but if density is more than
1.42 the crystals grow.. I havnt tried it myself?? Is it correct??
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DraconicAcid
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If you want it as a powder, why not just grow the crystals, and grind up the smaller ones?
Large crystals are best grown by slow evaporation of the solution. Smaller ones can be grown by fast cooling of hot, saturated solutions, or rapid
addition of methanol to concentrated aqueous solutions.
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
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Texium
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You can grow crystals by allowing a solution to evaporate, and then you can grind up some of the crystals into a powder if you need to. Can't confirm
whether or not the numbers you have are correct, but if you want a fine powder, it'll be easiest to grind up some crystals with a mortar and pestle.
Edit: DA beat me to it while I was typing, sorry for the redundancy
[Edited on 5-6-2015 by zts16]
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MrHomeScientist
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The idea of "growing a powder" seems very unlikely. As said above, the speed of cooling determines crystal size - slow cooling yields large single
crystals, rapid cooling yields tiny crystals that may resemble your requested powder. I agree that you'd be better off just grinding down whatever
crystal size you happen to have.
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