fusso
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Help verify solubility data
I was converting the solubility table bmp into xls since I tried to pm him to request for the xls(x) file but he has been inactive for a long time so
I think I can't get a reply from him. I encountered problems while I was inputting the data.
https://www.sciencemadness.org/whisper/viewthread.php?tid=66...
1. In the far down right corner starting from Fe2+ & C2O4 2-, there are a few"H" with inconsistent colours. Are the colours wrong or the letters?
2. A few organic acids' exact structure needs clarification: C4H2O4 2-(E or Z?), C6H2N3O7 - (though I'm quite sure is picric acid), C4H4O6 2-(+/- is
different from meso!), C4H4O4 2- (straight or branched, though I'm quite sure is succinic), C6H5O7 3-(even though I'm sure is citric), C7H5O3 -(even
though I'm sure is salicylic)
3. wtf is C14H15N2SO3?? This isnt even possible, and I don't think C14H14N2SO3 and C14H16N2SO3 are well characterized and common enough for someone to
measure their salts' solubilities.
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Bezaleel
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1. All letters H are in red, all letters P are in blue, and all letters M are in green. So I do not see any inconsistency in the table when it comes
to colours and letters.
Apparently, P (blue) means well soluble, M (green) means reasonable well soluble, H (red) means poorly soluble.
I have some doubts about how trustworthy the table is, because iron(III) thiocyanate is listed as well soluble (blue P), whereas the thiocyanate test
is a known test on the presence of iron(III).
I'd look for a different source if I were you. I think that Wiki's solubility table is more trustworthy. It also gives you some numbers instead of only a qualitative description.
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fusso
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Quote: Originally posted by Bezaleel  | 1. All letters H are in red, all letters P are in blue, and all letters M are in green. So I do not see any inconsistency in the table when it comes
to colours and letters.
Apparently, P (blue) means well soluble, M (green) means reasonable well soluble, H (red) means poorly soluble. |
rquote: In the far down right corner starting from Fe2+ & C2O4 2-, there are a few"H" with inconsistent colours. /rquote
(edit: Can't the software see it as 2 quotes instead of 1??? :mad
[Edited on 11/06/18 by fusso]
[Edited on 11/06/18 by fusso]
[Edited on 11/06/18 by fusso]
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DraconicAcid
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| Quote: Originally posted by Bezaleel | | I have some doubts about how trustworthy the table is, because iron(III) thiocyanate is listed as well soluble (blue P), whereas the thiocyanate test
is a known test on the presence of iron(III). |
Thiocyanate forms a highly-coloured complex with iron(III). It does not form a precipitate.
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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Bezaleel
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Silly me. Thanks for pointing that out!
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