{"id":1593,"date":"2024-08-25T18:05:06","date_gmt":"2024-08-25T16:05:06","guid":{"rendered":"https:\/\/antoine-escola.fr\/?p=1593"},"modified":"2025-09-28T12:18:09","modified_gmt":"2025-09-28T10:18:09","slug":"mesurer-une-conductivite","status":"publish","type":"post","link":"https:\/\/antoine-escola.fr\/index.php\/2024\/08\/25\/mesurer-une-conductivite\/","title":{"rendered":"Mesurer une conductivit\u00e9"},"content":{"rendered":"\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>La conductivit\u00e9 \u00e9lectrique d&rsquo;une solution se mesure avec une cellule de conductim\u00e9trie reli\u00e9e \u00e0 un <strong>conductim\u00e8tre<\/strong>.<\/p>\n\n\n\n<p>La cellule de conductim\u00e9trie est une double \u00e9lectrode constitu\u00e9e de deux plaques de platine platin\u00e9es espac\u00e9es d&rsquo;une distance fixe.<\/p>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><strong>Comment gagner en pr\u00e9cision ?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00e9talonner le conductim\u00e8tre avec la solution de chlorure de potassium et y renseigner la temp\u00e9rature de mesure.<\/li>\n\n\n\n<li>immerger <strong>totalement <\/strong>l&rsquo;\u00e9lectrode de conductim\u00e9trie.<\/li>\n\n\n\n<li>stopper l&rsquo;agitation lors de la mesure et atteindre que la valeur se stabilise.<\/li>\n\n\n\n<li>\u00eatre globalement rapide dans la mesure (le CO<sub>2<\/sub> atmosph\u00e9rique se dissolvant dans les solutions peut perturber la mesure en formant des ions hydrog\u00e9nocarbonate HCO<sub>3<\/sub><sup>&#8211;<\/sup>).<\/li>\n\n\n\n<li>v\u00e9rifier qu&rsquo;il n&rsquo;y a pas de bulle d&rsquo;air fix\u00e9e aux \u00e9lectrodes.<\/li>\n\n\n\n<li>v\u00e9rifier qu&rsquo;aucun compos\u00e9 chimique ne se soit d\u00e9pos\u00e9 sur les \u00e9lectrodes (bouchage par pr\u00e9cipitation).<\/li>\n<\/ul>\n\n\n\n<p><em>Remarque : il est important d&rsquo;\u00e9talonner le conductim\u00e8tre avant chaque s\u00e9rie de mesures afin de v\u00e9rifier que l&rsquo;ensemble du dispositif (conductim\u00e8tre, \u00e9lectrode et c\u00e2ble) est en bon \u00e9tat de fonctionnement.<\/em><\/p>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><strong>Vid\u00e9o explicative :<\/strong><\/p>\n\n\n\n<p><em>En cours de cr\u00e9ation !<\/em><\/p>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"403\" height=\"141\" src=\"https:\/\/antoine-escola.fr\/wp-content\/uploads\/2023\/01\/image.png\" alt=\"\" class=\"wp-image-120\" style=\"width:94px;height:33px\" srcset=\"https:\/\/antoine-escola.fr\/wp-content\/uploads\/2023\/01\/image.png 403w, https:\/\/antoine-escola.fr\/wp-content\/uploads\/2023\/01\/image-300x105.png 300w\" sizes=\"auto, (max-width: 403px) 100vw, 403px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"has-text-align-center\">Cet article est mis \u00e0 disposition selon les termes de la <a href=\"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/\" target=\"_blank\" rel=\"noreferrer noopener\">Licence Creative Commons Attribution &#8211; Pas d&rsquo;Utilisation Commerciale &#8211; Pas de Modification 4.0 International<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La conductivit\u00e9 \u00e9lectrique d&rsquo;une solution se mesure avec une cellule de conductim\u00e9trie reli\u00e9e \u00e0 un conductim\u00e8tre. La cellule de conductim\u00e9trie est une double \u00e9lectrode constitu\u00e9e de deux plaques de platine platin\u00e9es espac\u00e9es d&rsquo;une distance fixe. Comment gagner en pr\u00e9cision ? Remarque : il est important d&rsquo;\u00e9talonner le conductim\u00e8tre avant chaque s\u00e9rie de mesures afin de [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-1593","post","type-post","status-publish","format-standard","hentry","category-manipulation"],"_links":{"self":[{"href":"https:\/\/antoine-escola.fr\/index.php\/wp-json\/wp\/v2\/posts\/1593","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/antoine-escola.fr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/antoine-escola.fr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/antoine-escola.fr\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/antoine-escola.fr\/index.php\/wp-json\/wp\/v2\/comments?post=1593"}],"version-history":[{"count":5,"href":"https:\/\/antoine-escola.fr\/index.php\/wp-json\/wp\/v2\/posts\/1593\/revisions"}],"predecessor-version":[{"id":2072,"href":"https:\/\/antoine-escola.fr\/index.php\/wp-json\/wp\/v2\/posts\/1593\/revisions\/2072"}],"wp:attachment":[{"href":"https:\/\/antoine-escola.fr\/index.php\/wp-json\/wp\/v2\/media?parent=1593"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/antoine-escola.fr\/index.php\/wp-json\/wp\/v2\/categories?post=1593"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/antoine-escola.fr\/index.php\/wp-json\/wp\/v2\/tags?post=1593"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}