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Officially boggled. - helen-louise
Officially boggled.
A question for you at 4.30am:

Why on earth is the compound with formula Na2S2O4 called sodium HYDROsulfite when there's no sign of hydrogen anywhere near it? (It's also called sodium dithionate and sodium sulfoxylate, both of which are more sensible names). I'd think it was a typo for sodium hyposulfite if it wasn't so damned prevalent on the web. But sodium hyposulfite appears to be an old name for sodium thiosulphate, Na2S2O3.

Damn you, atoms with too many oxidation states for sensible names to work! (See also: nitrogen).

Current Mood: confused confused

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nmg From: nmg Date: 12th December 2011 09:14 (UTC) (Link)
Why on earth is the compound with formula Na2S2O4 called sodium HYDROsulfite

This is why we have IUPAC naming, I'd guess.
rhialto From: rhialto Date: 12th December 2011 10:24 (UTC) (Link)
I'm always confused by the name "sodium" while Na obviously stands for Natrium.
(ok, in Dutch we call it Natrium but in some cases we call compounds with it, such as Na2CO3, "soda"; in fact when sold for cleaning purposes that is typically called "zilversoda" and it certainly doesn't contain silver!)
karne_k From: karne_k Date: 12th December 2011 18:42 (UTC) (Link)
See also sodium hydrogen sulfite (NaHSO3). I've always really hated sulphur chemistry :)
baratron From: baratron Date: 12th December 2011 20:34 (UTC) (Link)
Mmm, but hydrogensulphite, hydrogensulphate, hydrogencarbonate etc. do at least all have hydrogen in!

But this part "hydro" in the hydrosulfite is FROM NOWHERE!

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