https://wiki.guldforum.se/w/index.php?action=history&feed=atom&title=J%C3%A4rn%28II%29hydroxid
Järn(II)hydroxid - Versionshistorik
2026-11-06T20:06:15Z
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https://wiki.guldforum.se/w/index.php?title=J%C3%A4rn(II)hydroxid&diff=12677&oldid=prev
Dan Olsson den 2 mars 2013 kl. 19.42
2013-03-02T19:42:38Z
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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 2 mars 2013 kl. 14.42</td>
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<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:Järnföreningar]]</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:Järnföreningar]]</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:Hydroxider]]</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:Hydroxider]]</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;">[[ar:هيدروكسيد الحديد الثنائي]]</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:Hidròxid de ferro (II)]]</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:Iron(II) hydroxide]]</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:Hidróxido de hierro (II)]]</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;">[[hu:Vas(II)-hidroxid]]</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=J%C3%A4rn(II)hydroxid&diff=7251&oldid=prev
Dan Olsson: 1 version
2013-02-24T14:13:22Z
<p>1 version</p>
<p><b>Ny sida</b></p><div>{{Kemibox<br />
|Vardagligt namn = <br />
|Bild = Hydroxid železnatý.PNG<br />
|Bildtext = Järn(II)hydroxid<br />
|Bildbredd = <br />
|Bild2 = <br />
|Bild2text = <br />
|Systematiskt namn = Järn(II)hydroxid<br />
|Övriga namn = Järnhydroxid, Grön&nbsp;järnoxid<br />
|Kemisk formel = [[Järn|Fe]]([[Hydroxid|OH]])<sub>2</sub><br />
|Utseende = Brunt pulver skiftande i grönt<br />
|CAS-nummer = 18624-44-7<br />
|SMILES = [Fe+2].[OH-].[OH-]<br />
|Molmassa = 89,86<br />
|Densitet = 3,4<br />
|Löslighet = 1,43 × 10<sup>-3</sup><br />
|LöslighetTemp = <br />
|Smältpunkt = <br />
|Smältextra = <br />
|Kokpunkt = <br />
|Kokextra = <br />
|Huvudfara = <br />
|NFPA704 = <br />
|LD50 = <br />
|}}<br />
<br />
'''Järn(II)hydroxid''' är en [[hydroxid]] av [[tvåvärt järn]] och har [[kemisk formel|formeln]] Fe(OH)<sub>2</sub>. Den förekommer naturligt i [[mineral]]et [[fougerit]].<br />
<br />
== Egenskaper ==<br />
Färgen på järn(II)hydroxid kan variera; Överskott på Fe<sup>3+</sup> gör den brun medan överskott på [[syre]] gör den grön. Det är en ''[[:en:Layered double hydroxide|Layered Double Hydroxide]]'' ('''LDH''') vilket ger den förmågan att binda [[anjon]]er till sin positivt laddade yta.<br />
<br />
== Framställning ==<br />
Järn(II)hydroxid framställs genom att [[järn(II)sulfat]] (FeSO<sub>4</sub>) får reagera med en [[bas (kemi)|bas]], till exempel [[natriumhydroxid]] (NaOH).<br />
:<math>\rm FeSO_4 + 2\ NaOH \rightarrow Fe(OH)_2 + Na_2SO_4</math><br />
<br />
== Användning ==<br />
På grund av att den är en '''LDH''' så används den för att rena vatten från [[Selenit (jon)|selenit]]– (SeO<sub>3</sub><sup>–</sup>) och [[selenat]]– (SeO<sub>4</sub><sup>2–</sup>) joner. Resultatet blir utfällningar av olösligt FeSe och FeSe<sub>2</sub>.<br />
<br />
Järn(II)hydroxid används också som [[anod]] i Ni-Fe batterier.<br />
<br />
== Se även ==<br />
* [[Järn(III)oxidhydroxid]]<br />
* [[Järn(II)oxid]]<br />
* [[Järn(II)sulfat]]<br />
<br />
[[Kategori:Järnföreningar]]<br />
[[Kategori:Hydroxider]]<br />
<br />
[[ar:هيدروكسيد الحديد الثنائي]]<br />
[[ca:Hidròxid de ferro (II)]]<br />
[[en:Iron(II) hydroxide]]<br />
[[es:Hidróxido de hierro (II)]]<br />
[[fa:هیدروکسید آهن(II)]]<br />
[[fr:Hydroxyde de fer]]<br />
[[hu:Vas(II)-hidroxid]]<br />
[[it:Idrossido ferroso]]<br />
[[nl:IJzer(II)hydroxide]]<br />
[[no:Jernhydroksid]]<br />
[[pt:Hidróxido de ferro (II)]]<br />
[[ru:Гидроксид железа(II)]]<br />
[[simple:Iron(II) hydroxide]]<br />
[[zh:氢氧化亚铁]]</div>
Dan Olsson