https://wiki.guldforum.se/w/index.php?action=history&feed=atom&title=Natriumkromat
Natriumkromat - Versionshistorik
2026-11-06T04:45:06Z
Versionshistorik för denna sida på wikin
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https://wiki.guldforum.se/w/index.php?title=Natriumkromat&diff=8806&oldid=prev
Dan Olsson den 24 februari 2013 kl. 16.55
2013-02-24T16:55:42Z
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Äldre version</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Versionen från 24 februari 2013 kl. 11.55</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l48">Rad 48:</td>
<td colspan="2" class="diff-lineno">Rad 48:</td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Kategori:Natriumföreningar]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Kategori:Natriumföreningar]]</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Kategori:Kromater]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Kategori:Kromater]]</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;"></del></div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">[[ca:Cromat de sodi]]</del></div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">[[cs:Chroman sodný]]</del></div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">[[de:Natriumchromat]]</del></div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">[[en:Sodium chromate]]</del></div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">[[es:Cromato de sodio]]</del></div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">[[fa:سدیم کرومات]]</del></div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">[[fr:Chromate de sodium]]</del></div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">[[it:Cromato di sodio]]</del></div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">[[nl:Natriumchromaat]]</del></div></td><td colspan="2" class="diff-side-added"></td></tr>
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<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">[[pl:Chromian sodu]]</del></div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">[[pt:Cromato de sódio]]</del></div></td><td colspan="2" class="diff-side-added"></td></tr>
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Dan Olsson
https://wiki.guldforum.se/w/index.php?title=Natriumkromat&diff=7113&oldid=prev
Dan Olsson: 1 version
2013-02-24T13:49:24Z
<p>1 version</p>
<p><b>Ny sida</b></p><div>{{Kemibox<br />
|Vardagligt namn = <br />
|Bild = Chroman sodný.JPG<br />
|Bildtext = Natriumkromat<br />
|Bildvertikal = ja<br />
|Bild2 = Sodium-chromate.svg<br />
|Bild2text = Strukturformel<br />
|Systematiskt namn = Natrium(I)kromat<br />
|Övriga namn = <br />
|Kemisk formel = [[Natrium|Na]]<sub>2</sub>[[Kromat|CrO<sub>4</sub>]]<br />
|Utseende = Gula kristaller<br />
|CAS-nummer = 7775-11-3<br />
|SMILES = [Na+].[Na+].[O-][Cr](=O)(=O)[O-]<br />
|Molmassa = 161,973<br />
|Densitet = 2,72<br />
|Löslighet = 530<br />
|LöslighetTemp = <br />
|Smältpunkt = 762<br />
|Smältextra = <br />
|Kokpunkt = <br />
|Kokextra = <br />
|Huvudfara = {{Farosymbol|T+}}{{Farosymbol|O}}{{Farosymbol|N}}<br />
|NFPA704 = {{NFPA 704|Hälsa=3|Eldfarlighet=0|Reaktivitet=1|Andra=OX}}<br />
|LD50 = 136 mg/kg<br />
|}}<br />
<br />
'''Natriumkromat''' är en [[jonförening]] (salt) av [[natrium]] och [[kromsyra]] med [[kemisk formel|formeln]] Na<sub>2</sub>CrO<sub>4</sub>.<br />
<br />
== Framställning ==<br />
Natriumkromat utvinns ur [[kromit]]-malm genom att behandla den med [[natriumkarbonat]] (Na<sub>2</sub>CO<sub>3</sub>).<br />
:<math>\rm 2\ FeCr_2O_4 + 8\ Na_2CO_3 + 7\ O_2 \rightarrow 8\ Na_2CrO_4 + 2\ Fe_2O_3 + 8\ CO_2</math><br />
<br />
För laboratoriebruk kan natriumkromat framställas genom att behandla [[natriumdikromat]] (Na<sub>2</sub>Cr<sub>2</sub>O<sub>7</sub>) med [[natriumhydroxid]] (NaOH).<br />
:<math>\rm Na_2Cr_2O_7 + 2\ NaOH \rightarrow 2\ Na_2CrO_4 + H_2O</math><br />
<br />
== Källor ==<br />
*[http://www.jtbaker.com/msds/englishhtml/s3362.htm Material Safety Data Sheet]<br />
<br />
== Se även ==<br />
*[[Natriumdikromat]]<br />
*[[Natriumsulfat]]<br />
<br />
{{enwp|url=http://en.wikipedia.org/w/index.php?title=Sodium_chromate&oldid=308172467}}<br />
{{ptwp|url=http://pt.wikipedia.org/w/index.php?title=Cromato_de_s%C3%B3dio&oldid=17843605}}<br />
<br />
{{oorgkemistub}}<br />
<br />
[[Kategori:Natriumföreningar]]<br />
[[Kategori:Kromater]]<br />
<br />
[[ca:Cromat de sodi]]<br />
[[cs:Chroman sodný]]<br />
[[de:Natriumchromat]]<br />
[[en:Sodium chromate]]<br />
[[es:Cromato de sodio]]<br />
[[fa:سدیم کرومات]]<br />
[[fr:Chromate de sodium]]<br />
[[it:Cromato di sodio]]<br />
[[nl:Natriumchromaat]]<br />
[[ja:クロム酸ナトリウム]]<br />
[[pl:Chromian sodu]]<br />
[[pt:Cromato de sódio]]<br />
[[ru:Хромат натрия]]<br />
[[simple:Sodium chromate]]<br />
[[fi:Natriumkromaatti]]<br />
[[vi:Natri cromat]]<br />
[[zh:铬酸钠]]</div>
Dan Olsson