{"id":1591,"date":"2024-08-25T18:05:12","date_gmt":"2024-08-25T16:05:12","guid":{"rendered":"https:\/\/antoine-escola.fr\/?p=1591"},"modified":"2025-09-28T12:17:58","modified_gmt":"2025-09-28T10:17:58","slug":"mesurer-un-potentiel","status":"publish","type":"post","link":"https:\/\/antoine-escola.fr\/index.php\/2024\/08\/25\/mesurer-un-potentiel\/","title":{"rendered":"Mesurer un potentiel"},"content":{"rendered":"\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>Le potentiel se mesure en utilisant deux \u00e9lectrodes reli\u00e9es \u00e0 un <strong>potentiom\u00e8tre<\/strong>.<\/p>\n\n\n\n<p>L&rsquo;<strong>\u00e9lectrode de mesure <\/strong>est l&rsquo;\u00e9lectrode qui permet de mesurer le potentiel.<\/p>\n\n\n\n<p><em>Exemples : \u00e9lectrode de platine, d&rsquo;argent ou de carbone graphite.<\/em><\/p>\n\n\n\n<p>L&rsquo;<strong>\u00e9lectrode de r\u00e9f\u00e9rence<\/strong> permet d&rsquo;avoir une \u00e9lectrode dont le potentiel est fixe et donc de mesurer la diff\u00e9rence de potentiel \\(E_{mesure}-E_{r\u00e9f\u00e9rence}\\).<\/p>\n\n\n\n<p><em>Exemples : \u00e9lectrode AgCl\/Ag, \u00e9lectrode au calomel satur\u00e9, \u00e9lectrode au sulfate mercureux<\/em><\/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>bien immerger les \u00e9lectrodes.<\/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>stocker les \u00e9lectrodes dans l&rsquo;eau distill\u00e9e en l&rsquo;absence d&rsquo;utilisation.<\/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 n&rsquo;y a pas d&rsquo;\u00e9talonnage \u00e0 r\u00e9aliser comme n&rsquo;importe quel voltm\u00e8tre ou multim\u00e8tre en physique.<\/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>Le potentiel se mesure en utilisant deux \u00e9lectrodes reli\u00e9es \u00e0 un potentiom\u00e8tre. L&rsquo;\u00e9lectrode de mesure est l&rsquo;\u00e9lectrode qui permet de mesurer le potentiel. Exemples : \u00e9lectrode de platine, d&rsquo;argent ou de carbone graphite. L&rsquo;\u00e9lectrode de r\u00e9f\u00e9rence permet d&rsquo;avoir une \u00e9lectrode dont le potentiel est fixe et donc de mesurer la diff\u00e9rence de potentiel . Exemples [&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-1591","post","type-post","status-publish","format-standard","hentry","category-manipulation"],"_links":{"self":[{"href":"https:\/\/antoine-escola.fr\/index.php\/wp-json\/wp\/v2\/posts\/1591","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=1591"}],"version-history":[{"count":6,"href":"https:\/\/antoine-escola.fr\/index.php\/wp-json\/wp\/v2\/posts\/1591\/revisions"}],"predecessor-version":[{"id":2071,"href":"https:\/\/antoine-escola.fr\/index.php\/wp-json\/wp\/v2\/posts\/1591\/revisions\/2071"}],"wp:attachment":[{"href":"https:\/\/antoine-escola.fr\/index.php\/wp-json\/wp\/v2\/media?parent=1591"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/antoine-escola.fr\/index.php\/wp-json\/wp\/v2\/categories?post=1591"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/antoine-escola.fr\/index.php\/wp-json\/wp\/v2\/tags?post=1591"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}