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CHRIS25
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Tomorrow I will be attempting to get the dihydrate SnCl2. The acidity is quite high so it should crystalize much more efficiently since it is
extremely soluble in water, this should make the solubility of the SnCl2 not so high.
‘Calcination… is such a Separation of Bodies by Fire, as makes ‘em easily reducible into Powder; and for that reason ‘tis call’d by some
Chymical Pulverization.’ (John Friend, Chymical Lectures London, 1712)
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. (William Penn 1644-1718)
The very nature of Random, Chance development precludes the existence of Order - strange that our organic and inorganic world is so well defined by
precision and law. (me)
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blogfast25
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No, it's concentrated SnCl2 solution. As C25 stated, it's very soluble in water and HCl. It just gets pretty viscous towards then end of the
crystallisation.
It did that with mine, made from 99.9 % tin.
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CHRIS25
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Excellent results. Stoichiometry calculations showed me that I could get my 0.19 moles of SnCl2 (deducted 10% from the Tin weight after weighing dry
antimony powder) in 80mLs of soln down to 20mLs giving me a 9.5 Molarity, the soln is now at 35mLs so doing well, keep cooling it to check for
precipiate then heating it again. The soln is now quite viscous, the perfect yellow tint colour. Anhydrous SnCl2 has a max molarity of 21M and the
Dihydrate 12M. So if I reach 9.5M I think I will stop, since having the crystalized product will only mean that I will have to use more HCl to
re-dissolve. I read that placing some tin into the air tight solution will prevent oxidation, but I do not think I need to do that with such a high
acidic solution.
And yes I have 3.2 grams of antimony powder, have no idea what to do with it though, seems a bit toxic to go messing with from what I read.
[Edited on 24-4-2014 by CHRIS25]
‘Calcination… is such a Separation of Bodies by Fire, as makes ‘em easily reducible into Powder; and for that reason ‘tis call’d by some
Chymical Pulverization.’ (John Friend, Chymical Lectures London, 1712)
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. (William Penn 1644-1718)
The very nature of Random, Chance development precludes the existence of Order - strange that our organic and inorganic world is so well defined by
precision and law. (me)
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blogfast25
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Quote: Originally posted by CHRIS25  | And yes I have 3.2 grams of antimony powder, have no idea what to do with it though, seems a bit toxic to go messing with from what I read.
[Edited on 24-4-2014 by CHRIS25] |
Use it to demonstrate another feature that distinguishes tin from antimony. Sb(V) compounds oxidise iodide to iodine, Sn(IV) ones do not.
Dissolve the antimony in strong HCl + H2O2, then simmer to reduce volume by at least half, to drive off/destroy any remaining excess H2O2. This
solution (essentially HSbCl<sub>6</sub> in HCl) will immediately cause iodine to form from iodide solutions. As said, Sn (IV) doesn't do
that...
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