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padding:0 .2em;\"\u003EDas Aussehen der deutschsprachigen Wikipedia hat sich geändert: Das Hauptmenü ist nun links neben dem Logo erreichbar, die eigene Diskussionsseite und Beitragsliste rechts neben dem Link zum Anmelden und die Werkzeugleiste mit Verweisen zu Schwesterprojekten wie Wikimedia Commons rechts neben dem Link zur Versionsgeschichte. \u003Ca href=\"/wiki/Hilfe:Skin/Vector_2022\" title=\"Hilfe:Skin/Vector 2022\"\u003EWeitere Informationen\u003C/a\u003E\u003C/div\u003E\u003C/div\u003E\u003C/div\u003E\u003C/div\u003E\u003C/div\u003E";}}());</script></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Website"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Inhaltsverzeichnis" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Inhaltsverzeichnis</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">In die Seitenleiste verschieben</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">Verbergen</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">(Anfang)</div> </a> </li> <li id="toc-Coprezipitation" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Coprezipitation"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Coprezipitation</span> </div> </a> <ul id="toc-Coprezipitation-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Siehe_auch" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Siehe_auch"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Siehe auch</span> </div> </a> <ul id="toc-Siehe_auch-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Weblinks" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Weblinks"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Weblinks</span> </div> </a> <ul id="toc-Weblinks-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Einzelnachweise" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Einzelnachweise"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Einzelnachweise</span> </div> </a> <ul id="toc-Einzelnachweise-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Inhaltsverzeichnis" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Inhaltsverzeichnis" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Inhaltsverzeichnis umschalten" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Inhaltsverzeichnis umschalten</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Fällung</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Zu einem Artikel in einer anderen Sprache gehen. Verfügbar in 50 Sprachen" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-50" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">50 Sprachen</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AA%D8%B1%D8%B3%D9%8A%D8%A8_(%D9%83%D9%8A%D9%85%D9%8A%D8%A7%D8%A1)" title="ترسيب (كيمياء) – Arabisch" lang="ar" hreflang="ar" data-title="ترسيب (كيمياء)" data-language-autonym="العربية" data-language-local-name="Arabisch" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%9F%D1%80%D0%B5%D1%86%D0%B8%D0%BF%D0%B8%D1%82%D0%B0%D1%86%D0%B8%D1%8F_(%D1%85%D0%B8%D0%BC%D0%B8%D1%8F)" title="Преципитация (химия) – Bulgarisch" lang="bg" hreflang="bg" data-title="Преципитация (химия)" data-language-autonym="Български" data-language-local-name="Bulgarisch" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Precipitacija" title="Precipitacija – Bosnisch" lang="bs" hreflang="bs" data-title="Precipitacija" data-language-autonym="Bosanski" data-language-local-name="Bosnisch" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Precipitaci%C3%B3_qu%C3%ADmica" title="Precipitació química – Katalanisch" lang="ca" hreflang="ca" data-title="Precipitació química" data-language-autonym="Català" data-language-local-name="Katalanisch" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Sr%C3%A1%C5%BEen%C3%AD_(chemie)" title="Srážení (chemie) – Tschechisch" lang="cs" hreflang="cs" data-title="Srážení (chemie)" data-language-autonym="Čeština" data-language-local-name="Tschechisch" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/%D3%B2%D0%BA%D0%B5%D0%B2" title="Ӳкев – Tschuwaschisch" lang="cv" hreflang="cv" data-title="Ӳкев" data-language-autonym="Чӑвашла" data-language-local-name="Tschuwaschisch" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%9A%CE%B1%CF%84%CE%B1%CE%B2%CF%8D%CE%B8%CE%B9%CF%83%CE%B7" title="Καταβύθιση – Griechisch" lang="el" hreflang="el" data-title="Καταβύθιση" data-language-autonym="Ελληνικά" data-language-local-name="Griechisch" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Precipitation_(chemistry)" title="Precipitation (chemistry) – Englisch" lang="en" hreflang="en" data-title="Precipitation (chemistry)" data-language-autonym="English" data-language-local-name="Englisch" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Precipitado_(kemio)" title="Precipitado (kemio) – Esperanto" lang="eo" hreflang="eo" data-title="Precipitado (kemio)" data-language-autonym="Esperanto" data-language-local-name="Esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Precipitado" title="Precipitado – Spanisch" lang="es" hreflang="es" data-title="Precipitado" data-language-autonym="Español" data-language-local-name="Spanisch" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Sadestamine_(keemia)" title="Sadestamine (keemia) – Estnisch" lang="et" hreflang="et" data-title="Sadestamine (keemia)" data-language-autonym="Eesti" data-language-local-name="Estnisch" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Hauspeatze" title="Hauspeatze – Baskisch" lang="eu" hreflang="eu" data-title="Hauspeatze" data-language-autonym="Euskara" data-language-local-name="Baskisch" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%AA%D9%87%E2%80%8C%D9%86%D8%B4%DB%8C%D9%86%DB%8C_(%D8%B4%DB%8C%D9%85%DB%8C)" title="ته‌نشینی (شیمی) – Persisch" lang="fa" hreflang="fa" data-title="ته‌نشینی (شیمی)" data-language-autonym="فارسی" data-language-local-name="Persisch" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Saostaminen_(kemia)" title="Saostaminen (kemia) – Finnisch" lang="fi" hreflang="fi" data-title="Saostaminen (kemia)" data-language-autonym="Suomi" data-language-local-name="Finnisch" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Pr%C3%A9cipit%C3%A9" title="Précipité – Französisch" lang="fr" hreflang="fr" data-title="Précipité" data-language-autonym="Français" data-language-local-name="Französisch" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Deascadh_(ceimic)" title="Deascadh (ceimic) – Irisch" lang="ga" hreflang="ga" data-title="Deascadh (ceimic)" data-language-autonym="Gaeilge" data-language-local-name="Irisch" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Precipitaci%C3%B3n_(reacci%C3%B3n)" title="Precipitación (reacción) – Galicisch" lang="gl" hreflang="gl" data-title="Precipitación (reacción)" data-language-autonym="Galego" data-language-local-name="Galicisch" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%AA%D7%92%D7%95%D7%91%D7%AA_%D7%A9%D7%99%D7%A7%D7%95%D7%A2" title="תגובת שיקוע – Hebräisch" lang="he" hreflang="he" data-title="תגובת שיקוע" data-language-autonym="עברית" data-language-local-name="Hebräisch" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%85%E0%A4%B5%E0%A4%95%E0%A5%8D%E0%A4%B7%E0%A5%87%E0%A4%AA%E0%A4%A3" title="अवक्षेपण – Hindi" lang="hi" hreflang="hi" data-title="अवक्षेपण" data-language-autonym="हिन्दी" data-language-local-name="Hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-ht mw-list-item"><a href="https://ht.wikipedia.org/wiki/Presipite" title="Presipite – Haiti-Kreolisch" lang="ht" hreflang="ht" data-title="Presipite" data-language-autonym="Kreyòl ayisyen" data-language-local-name="Haiti-Kreolisch" class="interlanguage-link-target"><span>Kreyòl ayisyen</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Reaksi_pengendapan" title="Reaksi pengendapan – Indonesisch" lang="id" hreflang="id" data-title="Reaksi pengendapan" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesisch" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-io mw-list-item"><a href="https://io.wikipedia.org/wiki/Precipito" title="Precipito – Ido" lang="io" hreflang="io" data-title="Precipito" data-language-autonym="Ido" data-language-local-name="Ido" class="interlanguage-link-target"><span>Ido</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Precipitazione_(chimica)" title="Precipitazione (chimica) – Italienisch" lang="it" hreflang="it" data-title="Precipitazione (chimica)" data-language-autonym="Italiano" data-language-local-name="Italienisch" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E6%B2%88%E6%AE%BF" title="沈殿 – Japanisch" lang="ja" hreflang="ja" data-title="沈殿" data-language-autonym="日本語" data-language-local-name="Japanisch" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%9F%D1%80%D0%B5%D1%86%D0%B8%D0%BF%D0%B8%D1%82%D0%B0%D1%86%D0%B8%D1%8F_%D1%80%D0%B5%D0%B0%D0%BA%D1%86%D0%B8%D1%8F%D1%81%D1%8B" title="Преципитация реакциясы – Kasachisch" lang="kk" hreflang="kk" data-title="Преципитация реакциясы" data-language-autonym="Қазақша" data-language-local-name="Kasachisch" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%B9%A8%EC%A0%84" title="침전 – Koreanisch" lang="ko" hreflang="ko" data-title="침전" data-language-autonym="한국어" data-language-local-name="Koreanisch" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-mg mw-list-item"><a href="https://mg.wikipedia.org/wiki/Siky" title="Siky – Malagasy" lang="mg" hreflang="mg" data-title="Siky" data-language-autonym="Malagasy" data-language-local-name="Malagasy" class="interlanguage-link-target"><span>Malagasy</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Neerslag_(scheikunde)" title="Neerslag (scheikunde) – Niederländisch" lang="nl" hreflang="nl" data-title="Neerslag (scheikunde)" data-language-autonym="Nederlands" data-language-local-name="Niederländisch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Fellingsreaksjon" title="Fellingsreaksjon – Norwegisch (Nynorsk)" lang="nn" hreflang="nn" data-title="Fellingsreaksjon" data-language-autonym="Norsk nynorsk" data-language-local-name="Norwegisch (Nynorsk)" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Fellingsreaksjon" title="Fellingsreaksjon – Norwegisch (Bokmål)" lang="nb" hreflang="nb" data-title="Fellingsreaksjon" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegisch (Bokmål)" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Str%C4%85canie" title="Strącanie – Polnisch" lang="pl" hreflang="pl" data-title="Strącanie" data-language-autonym="Polski" data-language-local-name="Polnisch" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Precipita%C3%A7%C3%A3o_(qu%C3%ADmica)" title="Precipitação (química) – Portugiesisch" lang="pt" hreflang="pt" data-title="Precipitação (química)" data-language-autonym="Português" data-language-local-name="Portugiesisch" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Precipitare_(chimie)" title="Precipitare (chimie) – Rumänisch" lang="ro" hreflang="ro" data-title="Precipitare (chimie)" data-language-autonym="Română" data-language-local-name="Rumänisch" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9E%D1%81%D0%B0%D0%B6%D0%B4%D0%B5%D0%BD%D0%B8%D0%B5" title="Осаждение – Russisch" lang="ru" hreflang="ru" data-title="Осаждение" data-language-autonym="Русский" data-language-local-name="Russisch" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Talog" title="Talog – Serbokroatisch" lang="sh" hreflang="sh" data-title="Talog" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="Serbokroatisch" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Chemical_precipitation" title="Chemical precipitation – einfaches Englisch" lang="en-simple" hreflang="en-simple" data-title="Chemical precipitation" data-language-autonym="Simple English" data-language-local-name="einfaches Englisch" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Obarjanje" title="Obarjanje – Slowenisch" lang="sl" hreflang="sl" data-title="Obarjanje" data-language-autonym="Slovenščina" data-language-local-name="Slowenisch" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a 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rahmenfarbe1 navigation-not-searchable noprint hatnote navigation-not-searchable" style="border-bottom-style: solid; border-bottom-width: 1px; font-size:95%; margin-bottom:1em; padding: 0.25em; overflow: hidden; word-break: break-word; word-wrap: break-word;" id="Vorlage_Dieser_Artikel"><div class="noviewer noresize" style="display: table-cell; padding-bottom: 0.2em; padding-left: 0.25em; padding-right: 1em; padding-top: 0.2em; vertical-align: middle;" id="bksicon" aria-hidden="true" role="presentation"><span typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/e/ea/Disambig-dark.svg/40px-Disambig-dark.svg.png" decoding="async" width="25" height="19" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/ea/Disambig-dark.svg/60px-Disambig-dark.svg.png 2x" data-file-width="444" data-file-height="340" /></span></span></div> <div style="display: table-cell; vertical-align: middle; width: 100%;"> <div role="navigation"> Dieser Artikel erläutert chemische Reaktionen. Für die Fällung eines Baumes siehe <a href="/wiki/F%C3%A4lltechnik" title="Fälltechnik">Fälltechnik</a>.</div> </div></div> <p>Mit <b>Fällung</b> oder <b>Präzipitation</b> (von <span style="font-style:normal;font-weight:normal"><a href="/wiki/Latein" title="Latein">lateinisch</a></span> <span lang="la-Latn" style="font-style:italic">praecipitatio</span> ‚das Herabstürzen‘) wird in der <a href="/wiki/Chemie" title="Chemie">Chemie</a> das Ausscheiden eines gelösten <a href="/wiki/Stoff_(Chemie)" title="Stoff (Chemie)">Stoffes</a> aus einer <a href="/wiki/L%C3%B6sung_(Chemie)" title="Lösung (Chemie)">Lösung</a> bezeichnet. Dies geschieht durch Überschreiten seiner <a href="/wiki/L%C3%B6slichkeit" title="Löslichkeit">Löslichkeit</a> aufgrund von Änderungen seiner Umgebungsbedingungen, z. B. durch Zusätze von geeigneten Substanzen (<a href="/wiki/F%C3%A4llungsmittel" class="mw-redirect" title="Fällungsmittel">Fällungsmittel</a>), <a href="/wiki/Kritische_L%C3%B6sungstemperatur" title="Kritische Lösungstemperatur">Temperatur-</a> und <a href="/wiki/Druck_(Physik)" title="Druck (Physik)">Druckänderung</a>, <a href="/wiki/Verdunstung" title="Verdunstung">Verdunstung</a> des <a href="/wiki/L%C3%B6sungsmittel" title="Lösungsmittel">Lösungsmittels</a> oder Änderung der <a href="/wiki/Polarit%C3%A4t_(Chemie)" title="Polarität (Chemie)">Polarität</a> des Lösungsmittels. Das Ausscheiden erfolgt als Niederschlag in Form von amorphen Flocken oder kristallinem Material.<sup id="cite_ref-Ebel_1-0" class="reference"><a href="#cite_note-Ebel-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> Grundsätzlich findet dabei ein <a href="/wiki/Phasen%C3%BCbergang" title="Phasenübergang">Phasenübergang</a> der zuvor gelösten Substanz statt. </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Datei:Absperrventil_f%C3%BCr_Heizungs-R%C3%BCcklauf.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/21/Absperrventil_f%C3%BCr_Heizungs-R%C3%BCcklauf.jpg/220px-Absperrventil_f%C3%BCr_Heizungs-R%C3%BCcklauf.jpg" decoding="async" width="220" height="217" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/21/Absperrventil_f%C3%BCr_Heizungs-R%C3%BCcklauf.jpg/330px-Absperrventil_f%C3%BCr_Heizungs-R%C3%BCcklauf.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/21/Absperrventil_f%C3%BCr_Heizungs-R%C3%BCcklauf.jpg/440px-Absperrventil_f%C3%BCr_Heizungs-R%C3%BCcklauf.jpg 2x" data-file-width="2012" data-file-height="1980" /></a><figcaption>Kalkablagerungen an einem undichten <a href="/wiki/Absperrventil" title="Absperrventil">Absperrventil</a></figcaption></figure> <p>Ein zugegebenes Fällungsmittel kann dabei Bestandteil des Niederschlags werden oder die gelöste Substanz in eine schwerlöslichere umsetzen, oder nur die Lösungseigenschaften des Lösungsmittels ändern. Die Niederschläge der ausgefällten Feststoffe sind zunächst meist <a href="/wiki/Einkristall" title="Einkristall">mikrokristallin</a> oder <a href="/wiki/Amorphes_Material" title="Amorphes Material">amorph</a>. Mit der Zeit kann durch Umkristallisation die Bildung einer stabileren Kristallmodifikation stattfinden. Oft vergrößern sich diese Teilchen bei Alterung durch zusätzliche <a href="/wiki/Agglomerieren_(Verfahrenstechnik)" title="Agglomerieren (Verfahrenstechnik)">Agglomeration</a>. Dadurch lassen sie sich besser filtrieren oder bilden einen Bodensatz. Mit der Alterung der Niederschläge verringert sich häufig deren Löslichkeit weiter. </p><p>Die Bildung des <b>Niederschlags</b> oder <b>Präzipitats</b> durch Ausfällung kann auf mehrere Arten ausgelöst werden, durch <a href="/wiki/F%C3%A4llungsreaktion" title="Fällungsreaktion">Fällungsreaktionen</a>, Veränderung des <a href="/wiki/PH-Wert" title="PH-Wert">pH-Werts</a> oder Überschreiten des <a href="/wiki/L%C3%B6slichkeitsprodukt" class="mw-redirect" title="Löslichkeitsprodukt">Löslichkeitsprodukts</a>. Die darüberstehende Flüssigkeit wird als <b>Überstand</b> bezeichnet. </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Datei:Faellung_von_Uranylcarbonat.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/0/04/Faellung_von_Uranylcarbonat.jpg/250px-Faellung_von_Uranylcarbonat.jpg" decoding="async" width="220" height="147" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/04/Faellung_von_Uranylcarbonat.jpg/330px-Faellung_von_Uranylcarbonat.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/04/Faellung_von_Uranylcarbonat.jpg/500px-Faellung_von_Uranylcarbonat.jpg 2x" data-file-width="1280" data-file-height="853" /></a><figcaption>Fällung von Uranylcarbonat</figcaption></figure> <p>In der <a href="/wiki/Biochemie" title="Biochemie">Biochemie</a> bezeichnet man als <i>Präzipitation</i> speziell das Ausfällen von <a href="/wiki/Protein" title="Protein">Proteinen</a> oder <a href="/wiki/Nukleins%C3%A4ure" class="mw-redirect" title="Nukleinsäure">Nukleinsäuren</a>. Die Wirkung bestimmter <a href="/wiki/Salze" title="Salze">Salze</a> auf die Löslichkeit entsprechender <a href="/wiki/Organische_Verbindungen" class="mw-redirect" title="Organische Verbindungen">organischer Verbindungen</a> wird mittels der <a href="/wiki/Hofmeister-Reihe" title="Hofmeister-Reihe">Hofmeister-Reihe</a> charakterisiert. Spezielle Fällungsmethoden in der Biochemie sind unter anderem die <a href="/wiki/Ammoniumsulfat-F%C3%A4llung" title="Ammoniumsulfat-Fällung">Ammoniumsulfat-Fällung</a>, die <a href="/wiki/PEG-F%C3%A4llung" title="PEG-Fällung">PEG-Fällung</a>, die <a href="/wiki/TCA-F%C3%A4llung" title="TCA-Fällung">TCA-Fällung</a> (denaturierend), die <a href="/wiki/Ethanolf%C3%A4llung" class="mw-redirect" title="Ethanolfällung">Ethanolfällung</a> (denaturierend) und die <a href="/wiki/Hitzef%C3%A4llung" title="Hitzefällung">Hitzefällung</a> (denaturierend).<sup id="cite_ref-Pingoud_2-0" class="reference"><a href="#cite_note-Pingoud-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p><p>Bei der <a href="/wiki/Abwasserreinigung" class="mw-redirect" title="Abwasserreinigung">Abwasserreinigung</a> wird neben der Fällung mit Fällungsmitteln häufig zur Entfernung von kolloidal gelösten Inhaltsstoffen die <a href="/wiki/Flockung" title="Flockung">Flockung</a> unter Anwendung von <a href="/wiki/Flockungsmittel" title="Flockungsmittel">Flockungsmitteln</a> oder auch <a href="/wiki/Flockungshilfsmittel" title="Flockungshilfsmittel">Flockungshilfsmitteln</a> angewendet. Die Abtrennung und der Rückhalt der ausgefällten Stoffe erfolgt anschließend häufig mittels <a href="/wiki/Sandfilter" title="Sandfilter">Sandfiltern</a> oder <a href="/wiki/Polstofffiltration" title="Polstofffiltration">Polstofffiltration</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Coprezipitation">Coprezipitation</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=F%C3%A4llung&veaction=edit&section=1" title="Abschnitt bearbeiten: Coprezipitation" class="mw-editsection-visualeditor"><span>Bearbeiten</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=F%C3%A4llung&action=edit&section=1" title="Quellcode des Abschnitts bearbeiten: Coprezipitation"><span>Quelltext bearbeiten</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Die Coprezipitation ist eine besondere Form der Fällung, bei der die Edukte zunächst in Lösung gebracht werden um eine homogene Verteilung zu gewährleisten. Anschließend kommt es durch das Vermischen der beiden Lösungen oder dem Zuführen einer weiteren Lösung zur Fällungsreaktion, dabei können sich u. a. Hydroxide oder Carbonate bilden. Das nun homogene Festkörpergemisch kann anschließend filtriert und weiterverarbeitet werden. Diese Weiterverarbeitung kann zum Beispiel das Brennen in einem Ofen sein (z. B. bei der <a href="/w/index.php?title=Nickelaluminat&action=edit&redlink=1" class="new" title="Nickelaluminat (Seite nicht vorhanden)">Nickelaluminat</a>-Synthese).<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Siehe_auch">Siehe auch</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=F%C3%A4llung&veaction=edit&section=2" title="Abschnitt bearbeiten: Siehe auch" class="mw-editsection-visualeditor"><span>Bearbeiten</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=F%C3%A4llung&action=edit&section=2" title="Quellcode des Abschnitts bearbeiten: Siehe auch"><span>Quelltext bearbeiten</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/F%C3%A4llungsanalyse" class="mw-redirect" title="Fällungsanalyse">Fällungsanalyse</a>, <a href="/wiki/Hydratation" title="Hydratation">Hydratation</a>, <a href="/wiki/Solvation" class="mw-redirect" title="Solvation">Solvation</a>, <a href="/wiki/Pr%C3%A4zipitation_(Immunologie)" title="Präzipitation (Immunologie)">Präzipitation (Immunologie)</a></li> <li><a href="/wiki/Sinter" title="Sinter">Sinter</a>, <a href="/wiki/Impr%C3%A4gnation_(Geologie)" title="Imprägnation (Geologie)">Imprägnation (Geologie)</a>, Mineralisation aus anorganischen Lösungen</li> <li><a href="/wiki/Scavengerf%C3%A4llung" title="Scavengerfällung">Scavengerfällung</a></li> <li><a href="/wiki/Stoffkumulation" class="mw-redirect" title="Stoffkumulation">Stoffkumulation</a>, <a href="/wiki/Sedimentation" title="Sedimentation">Sedimentation</a></li> <li><a href="/wiki/Liesegangsche_Ringe" title="Liesegangsche Ringe">Liesegangsche Ringe</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Weblinks">Weblinks</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=F%C3%A4llung&veaction=edit&section=3" title="Abschnitt bearbeiten: Weblinks" class="mw-editsection-visualeditor"><span>Bearbeiten</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=F%C3%A4llung&action=edit&section=3" title="Quellcode des Abschnitts bearbeiten: Weblinks"><span>Quelltext bearbeiten</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="sisterproject" style="margin:0.1em 0 0 0;"><div class="noresize noviewer" style="display:inline-block; line-height:10px; min-width:1.6em; text-align:center;" aria-hidden="true" role="presentation"><span class="mw-default-size" typeof="mw:File"><span title="Commons"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/20px-Commons-logo.svg.png" decoding="async" width="12" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/40px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></span></span></div><b><span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:Solid_precipitation?uselang=de"><span lang="en">Commons</span>: Fällung</a></span></b> – Sammlung von Bildern, Videos und Audiodateien</div> <div class="mw-heading mw-heading2"><h2 id="Einzelnachweise">Einzelnachweise</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=F%C3%A4llung&veaction=edit&section=4" title="Abschnitt bearbeiten: Einzelnachweise" class="mw-editsection-visualeditor"><span>Bearbeiten</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=F%C3%A4llung&action=edit&section=4" title="Quellcode des Abschnitts bearbeiten: Einzelnachweise"><span>Quelltext bearbeiten</span></a><span class="mw-editsection-bracket">]</span></span></div> <ol class="references"> <li id="cite_note-Ebel-1"><span class="mw-cite-backlink"><a href="#cite_ref-Ebel_1-0">↑</a></span> <span class="reference-text"><a href="/wiki/Siegfried_Ebel" title="Siegfried Ebel">S. Ebel</a>, <a href="/wiki/Hermann_J._Roth" title="Hermann J. Roth">H. J. Roth</a> (Herausgeber): <i>Lexikon der Pharmazie.</i> Georg Thieme Verlag, 1987, S. 464, <a href="/wiki/Spezial:ISBN-Suche/3136722019" class="internal mw-magiclink-isbn">ISBN 3-13-672201-9</a>.</span> </li> <li id="cite_note-Pingoud-2"><span class="mw-cite-backlink"><a href="#cite_ref-Pingoud_2-0">↑</a></span> <span class="reference-text"><a href="/wiki/Alfred_Pingoud" title="Alfred Pingoud">Alfred Pingoud</a>: <i>Arbeitsmethoden der Biochemie.</i> Walter de Gruyter, 1997, <a href="/wiki/Spezial:ISBN-Suche/9783110165135" class="internal mw-magiclink-isbn">ISBN 978-3-11-016513-5</a>, S. 53–56.</span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><a href="#cite_ref-3">↑</a></span> <span class="reference-text">Philipp Kurz, Norbert Stock: <i>Synthetische Anorganische Chemie: Grundkurs</i>. Walter de Gruyter, Berlin 2013, <a href="/wiki/Spezial:ISBN-Suche/9783110258745" class="internal mw-magiclink-isbn">ISBN 978-3-11-025874-5</a>, S. 41.</span> </li> </ol></div><noscript><img src="https://auth.wikimedia.org/loginwiki/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=1x1&usesul3=1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Abgerufen von „<a dir="ltr" href="https://de.wikipedia.org/w/index.php?title=Fällung&oldid=248040336">https://de.wikipedia.org/w/index.php?title=Fällung&oldid=248040336</a>“</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Wikipedia:Kategorien" title="Wikipedia:Kategorien">Kategorien</a>: <ul><li><a href="/wiki/Kategorie:Chemisch-technisches_Verfahren" title="Kategorie:Chemisch-technisches Verfahren">Chemisch-technisches Verfahren</a></li><li><a href="/wiki/Kategorie:Trennverfahren" title="Kategorie:Trennverfahren">Trennverfahren</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> Diese Seite wurde zuletzt am 25. 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cdx-button--weight-quiet cdx-button--icon-only" id="ca-edit-sticky-header" tabindex="-1" data-event-name="wikitext-edit-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-wikiText mw-ui-icon-wikimedia-wikimedia-wikiText"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-viewsource-sticky-header" tabindex="-1" data-event-name="ve-edit-protected-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-editLock mw-ui-icon-wikimedia-wikimedia-editLock"></span> <span></span> </a> </div> <div class="vector-sticky-header-buttons"> <button class="cdx-button cdx-button--weight-quiet mw-interlanguage-selector" id="p-lang-btn-sticky-header" tabindex="-1" data-event-name="ui.dropdown-p-lang-btn-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-language mw-ui-icon-wikimedia-wikimedia-language"></span> <span>50 Sprachen</span> </button> <a href="#" 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Inc.","logo":{"@type":"ImageObject","url":"https:\/\/www.wikimedia.org\/static\/images\/wmf-hor-googpub.png"}},"datePublished":"2003-10-26T19:36:02Z","image":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/2\/21\/Absperrventil_f%C3%BCr_Heizungs-R%C3%BCcklauf.jpg","headline":"Ausscheiden eines gel\u00f6sten Stoffes aus einer L\u00f6sung"}</script> </body> </html>