https://wiki.guldforum.se/w/index.php?action=history&feed=atom&title=Redox
Redox - Versionshistorik
2026-10-18T04:56:59Z
Versionshistorik för denna sida på wikin
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https://wiki.guldforum.se/w/index.php?title=Redox&diff=10077&oldid=prev
Dan Olsson den 25 februari 2013 kl. 01.05
2013-02-25T01:05:45Z
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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. 21.05</td>
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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;">[[ca:Reacció d'oxidació-reducció]]</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;">[[nl:Redoxreactie]]</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;">[[ja:酸化還元反応]]</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;">[[pt:Reação redox]]</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;">[[ro:Redox]]</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;">[[ru:Окислительно-восстановительные реакции]]</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;">[[sk:Oxidačno-redukčná reakcia]]</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;">[[sr:Оксидо-редукција]]</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;">[[fi:Hapetus-pelkistysreaktio]]</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;">[[ta:குறைத்தல் (வேதியியல்)]]</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;">[[th:ปฏิกิริยารีดอกซ์]]</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;">[[tr:Redoks]]</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;">[[uk:Окисно-відновна реакція]]</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;">[[ur:تخسید]]</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=Redox&diff=6187&oldid=prev
Dan Olsson: 1 version
2013-02-24T09:42:37Z
<p>1 version</p>
<p><b>Ny sida</b></p><div>'''Redox''' är det [[kemi]]ska fenomen vid vilket [[oxidationstal]]en hos [[atom]]er förändras. Vanligtvis sker detta genom att en eller flera [[elektron]]er förflyttas från en atom till en annan. <br />
* '''[[Oxidation]]''' är det fenomen varvid en atom, [[molekyl]] eller [[jon]] '''avger''' en eller flera elektroner. Oxidationstalet '''stiger'''.<br />
* '''Reduktion''' är det fenomen varvid en atom, molekyl eller jon '''upptar''' en eller flera elektroner. Oxidationstalet '''sjunker'''.<br />
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Vid en '''redoxreaktion''' sker alltså en reduktion och en oxidation samtidigt. Eftersom laddningar hos joner och atomer i en reaktion är detsamma före reaktionen som efter och eftersom elektroner ogillar att vara i fritt tillstånd, så sker det alltid en reduktion samtidigt som en oxidation, och vice versa. Notera att redox-reaktioner kan gå åt bägge håll, beroende på både [[pE (måttenhet)|pE]]-värdet och [[pH]]-värdet. <br />
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Ett ämne som får ett annat ämne att oxidera kallas '''oxidationsmedel'''. Ett ämne som får ett annat ämne att reducera kallas '''reduktionsmedel''' eller '''elektrondonator'''.<br />
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I vardagligt språkbruk avses med oxidering ofta en process där ett ämne reagerar med [[syre]]. Syre är också ett mycket vanligt oxidationsmedel, men redoxreaktioner kan också ske utan syre.<br />
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== Exempel på redoxreaktion ==<br />
<math>\mathrm{H}_2 + \mathrm{Cl}_2 \longrightarrow 2\ \mathrm{HCl}</math><br /><br />
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Cl<sub>2</sub> är väldigt [[elektronegativitet|elektronegativt]] och kommer därför att underlätta vätets oxidation. Klor är ett oxidationsmedel. Annorlunda uttryckt sitter elektronerna särskilt bra fast vid kloratomerna. Klor reduceras av vätet, som är ett reduktionsmedel. Elektronerna på väte sitter "lösare" eller, annorlunda uttryckt, de är mindre bundna än elektronerna på klor. Detta orsakar att Cl<sub>2</sub> tar upp de två elektroner som vätet avger.<br />
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<math>\mathrm{Na} + \mathrm{Cl} \longrightarrow \mathrm{Na}</math><sup>+</sup><math>\mathrm{Cl}</math><sup>-</sup><br /><br />
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Klor reduceras när natrium avger sin extra elektron från sitt yttersta skal och därigenom oxideras. Produkten som bildas, det vill säga natriumklorid, är mer stabil än de båda utgångsämnena natrium och klor. Även om joniseringen av natrium "kostar" mer energi än vad som "återfås" vid bildandet av kloridjonen, stabilseras produkten natriumklorid av attraktionen mellan natriumjoner och kloridjoner. Ett ofta förekommande påstående att klor och natrium "vill" ha sina yttre skal fulla, kan tjäna som minnesregel, men har ingen som helst fysikalisk grund.<br />
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== Se även ==<br />
* [[Järnproduktion]]<br />
* [[Redoxpotential]]<br />
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[[Kategori:Fysikalisk kemi]]<br />
[[Kategori:Kemiska reaktioner]]<br />
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[[ar:تفاعلات أكسدة-اختزال]]<br />
[[be:Акісленне]]<br />
[[bs:Redoks reakcija]]<br />
[[be-x-old:Затляняльна-аднаўленчыя рэакцыі]]<br />
[[bg:Окислително-редукционни процеси]]<br />
[[ca:Reacció d'oxidació-reducció]]<br />
[[cs:Redoxní reakce]]<br />
[[cy:Rhydocs]]<br />
[[da:Redoxreaktion]]<br />
[[de:Redoxreaktion]]<br />
[[et:Redoksreaktsioon]]<br />
[[el:Οξειδοαναγωγή]]<br />
[[en:Redox]]<br />
[[es:Reducción-oxidación]]<br />
[[eo:Redoksa reakcio]]<br />
[[eu:Erredox erreakzio]]<br />
[[fa:اکسایش و کاهش]]<br />
[[fr:Réaction d'oxydo-réduction]]<br />
[[ko:산화·환원 반응]]<br />
[[hi:आक्सीकरण]]<br />
[[hr:Redoks]]<br />
[[io:Redoxo]]<br />
[[id:Redoks]]<br />
[[it:Ossidoriduzione]]<br />
[[he:חמצון-חיזור]]<br />
[[kk:Балқытпа қалдық]]<br />
[[ht:Oksidasyon]]<br />
[[lv:Oksidēšanās-reducēšanās reakcijas]]<br />
[[lt:Oksidacijos-redukcijos reakcija]]<br />
[[mk:Оксидационо-редукциона реакција]]<br />
[[nl:Redoxreactie]]<br />
[[ja:酸化還元反応]]<br />
[[nn:Redoksreaksjon]]<br />
[[pl:Reakcja redoks]]<br />
[[pt:Reação redox]]<br />
[[ro:Redox]]<br />
[[ru:Окислительно-восстановительные реакции]]<br />
[[sq:Reaksionet redoks]]<br />
[[simple:Redox]]<br />
[[sk:Oxidačno-redukčná reakcia]]<br />
[[sl:Redoks reakcija]]<br />
[[sr:Оксидо-редукција]]<br />
[[fi:Hapetus-pelkistysreaktio]]<br />
[[ta:குறைத்தல் (வேதியியல்)]]<br />
[[th:ปฏิกิริยารีดอกซ์]]<br />
[[tr:Redoks]]<br />
[[uk:Окисно-відновна реакція]]<br />
[[ur:تخسید]]<br />
[[zh-yue:氧化]]<br />
[[zh:氧化还原反应]]</div>
Dan Olsson