{"id":3597,"date":"2023-10-24T12:11:46","date_gmt":"2023-10-24T10:11:46","guid":{"rendered":"https:\/\/www.em-grade.com\/non-classifiee\/hydrogen-potential\/"},"modified":"2024-02-15T17:35:10","modified_gmt":"2024-02-15T16:35:10","slug":"potentiel-hydrogene","status":"publish","type":"post","link":"https:\/\/www.em-grade.com\/fr\/definitions-de-chimie\/potentiel-hydrogene\/","title":{"rendered":"Potentiel Hydrog\u00e8ne"},"content":{"rendered":"<p>Le potentiel hydrog\u00e8ne, not\u00e9 pH, est une mesure de l\u2019activit\u00e9 chimique des hydrons (appel\u00e9s aussi couramment protons ou ions hydrog\u00e8nenote 1) en solution. Notamment, en solution aqueuse, ces ions sont pr\u00e9sents sous la forme de l\u2019ion hydronium (le plus simple des ions oxonium).<\/p>\n<p>Plus souvent, le pH mesure l\u2019acidit\u00e9 ou la basicit\u00e9 d\u2019une solution. Ainsi, dans un milieu aqueux \u00e0 25 \u00b0C :<\/p>\n<ul>\n<li>une solution de pH = 7 est dite neutre ;<\/li>\n<li>une solution de pH &lt; 7 est dite acide ; plus son pH diminue, plus elle est acide;<\/li>\n<li>une solution de pH &gt; 7 est dite basique ; plus son pH augmente, plus elle est basique.<\/li>\n<\/ul>\n<p><a href=\"https:\/\/www.em-grade.com\/wp-content\/uploads\/2023\/10\/potentiel-H.jpg\"><img alt=\"\" loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-1592\" src=\"https:\/\/www.em-grade.com\/wp-content\/uploads\/2023\/10\/potentiel-H-300x300.jpg\" alt=\"\" width=\"300\" height=\"300\" srcset=\"https:\/\/www.em-grade.com\/wp-content\/uploads\/2023\/10\/potentiel-H-300x300.jpg 300w, https:\/\/www.em-grade.com\/wp-content\/uploads\/2023\/10\/potentiel-H-150x150.jpg 150w, https:\/\/www.em-grade.com\/wp-content\/uploads\/2023\/10\/potentiel-H-600x600.jpg 600w, https:\/\/www.em-grade.com\/wp-content\/uploads\/2023\/10\/potentiel-H-140x140.jpg 140w, https:\/\/www.em-grade.com\/wp-content\/uploads\/2023\/10\/potentiel-H-100x100.jpg 100w, https:\/\/www.em-grade.com\/wp-content\/uploads\/2023\/10\/potentiel-H-500x500.jpg 500w, https:\/\/www.em-grade.com\/wp-content\/uploads\/2023\/10\/potentiel-H-350x350.jpg 350w, https:\/\/www.em-grade.com\/wp-content\/uploads\/2023\/10\/potentiel-H.jpg 615w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>Le pH joue un role fondamental dans la physiologie cellulaire.Chaque compartiment cellulaire \u00e0 un potentiel H+ propre, en general le pH moyen est compris entre 7 et 7,4 c\u2019est pour cette raison que les tampons utilis\u00e9s en microscopie electronique sont voisin de 7,4.<\/p>\n<p>Pour cela ajuster vos pH de vos tampons et tampon fixateur au compartiments cellulaire que vous \u00e9tudi\u00e9 ou bien si tout vous interesse dans l\u2019ultrastructure cellulare ajuster votre pH \u00e0 7,2 ou 7,4.<br \/>\nNacer Benmeradi<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le potentiel hydrog\u00e8ne, not\u00e9 pH, est une mesure de l\u2019activit\u00e9 chimique des hydrons (appel\u00e9s aussi couramment protons ou ions hydrog\u00e8nenote 1) en solution. Notamment, en solution aqueuse, ces ions sont&#8230;<\/p>\n","protected":false},"author":8,"featured_media":3499,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"","_seopress_redirections_param":"","_seopress_redirections_type":0,"_seopress_analysis_target_kw":"","_seopress_news_disabled":"","_seopress_video_disabled":"","_seopress_video":[],"_seopress_pro_schemas_manual":[],"_seopress_pro_rich_snippets_disable_all":"","_seopress_pro_rich_snippets_disable":[],"_seopress_pro_schemas":[],"itsec_x_frame_options":"","footnotes":""},"categories":[288],"tags":[],"class_list":["post-3597","post","type-post","status-publish","format-standard","has-post-thumbnail","category-definitions-de-chimie"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.em-grade.com\/fr\/wp-json\/wp\/v2\/posts\/3597","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.em-grade.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.em-grade.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.em-grade.com\/fr\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/www.em-grade.com\/fr\/wp-json\/wp\/v2\/comments?post=3597"}],"version-history":[{"count":0,"href":"https:\/\/www.em-grade.com\/fr\/wp-json\/wp\/v2\/posts\/3597\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.em-grade.com\/fr\/wp-json\/wp\/v2\/media\/3499"}],"wp:attachment":[{"href":"https:\/\/www.em-grade.com\/fr\/wp-json\/wp\/v2\/media?parent=3597"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.em-grade.com\/fr\/wp-json\/wp\/v2\/categories?post=3597"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.em-grade.com\/fr\/wp-json\/wp\/v2\/tags?post=3597"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}