{"id":9850,"date":"2024-09-05T17:31:35","date_gmt":"2024-09-05T15:31:35","guid":{"rendered":"https:\/\/www.hdebalzac.fr\/?p=9850"},"modified":"2024-09-05T17:31:40","modified_gmt":"2024-09-05T15:31:40","slug":"la-chimie-du-quotidien-des-secrets-du-vin-a-la-puissance-de-leau-oxygenee","status":"publish","type":"post","link":"https:\/\/www.hdebalzac.fr\/index.php\/2024\/09\/05\/la-chimie-du-quotidien-des-secrets-du-vin-a-la-puissance-de-leau-oxygenee\/","title":{"rendered":"La chimie du quotidien : des secrets du vin \u00e0 la puissance de l&rsquo;eau oxyg\u00e9n\u00e9e"},"content":{"rendered":"\n<p class=\"has-drop-cap\" style=\"font-size:18px\">Avez-vous d\u00e9j\u00e0 r\u00e9fl\u00e9chi \u00e0 la science cach\u00e9e derri\u00e8re votre verre de vin pr\u00e9f\u00e9r\u00e9 ? Ou \u00e0 la pr\u00e9cision n\u00e9cessaire pour que votre d\u00e9sinfectant soit efficace sans \u00eatre dangereux ? Plongeons dans le monde fascinant de la chimie appliqu\u00e9e, o\u00f9 <strong>les<\/strong> <strong>\u00e9l\u00e8ves de baccalaur\u00e9at professionnel Bio-Industries de Transformation<\/strong> <strong>(BIT) <\/strong>nous r\u00e9v\u00e8lent les secrets mol\u00e9culaires de nos produits quotidiens.<\/p>\n\n\n\n<p class=\"has-text-align-center\"><\/p>\n\n\n\n<h1 class=\"wp-block-heading\">L&rsquo;acidit\u00e9 du vin : la cl\u00e9 d&rsquo;un \u00e9quilibre parfait<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Le pH-m\u00e8tre : l&rsquo;arbitre pr\u00e9cis du go\u00fbt<\/h2>\n\n\n\n<p style=\"font-size:14px\">Dans le laboratoire, nos apprentis \u0153nologues BIT s&rsquo;attaquent \u00e0 l&rsquo;analyse d&rsquo;un vin blanc. Voici leur exp\u00e9rience pas \u00e0 pas :<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:14px\">Dilution de l&rsquo;\u00e9chantillon.<\/li>\n\n\n\n<li style=\"font-size:14px\">Pr\u00e9paration du pH-m\u00e8tre.<\/li>\n\n\n\n<li style=\"font-size:14px\">Ajout progressif de soude.<\/li>\n\n\n\n<li style=\"font-size:14px\">Suivi du pH et changement de couleur.<\/li>\n\n\n\n<li style=\"font-size:14px\">D\u00e9termination de l&rsquo;acidit\u00e9 totale.<\/li>\n<\/ol>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Briana nous guide \u00e0 travers l&rsquo;exp\u00e9rience : \u00ab Je dilue un \u00e9chantillon de vin, puis j&rsquo;ajoute de la soude petit \u00e0 petit. Le plus cool, c&rsquo;est qu&rsquo;on peut voir la r\u00e9action de deux fa\u00e7ons : le pH-m\u00e8tre nous dit quand on atteint pH 7, et le bleu de bromothymol change de couleur. Il passe du jaune au bleu quand tous les acides sont neutralis\u00e9s \u00bb.<\/p>\n<\/blockquote>\n\n\n\n<figure class=\"wp-block-video\"><video height=\"1440\" style=\"aspect-ratio: 1440 \/ 1440;\" width=\"1440\" controls src=\"https:\/\/www.hdebalzac.fr\/wp-content\/uploads\/2024\/08\/BIT-TP-Chimie-Vin.mp4\"><\/video><figcaption class=\"wp-element-caption\"><em>Dosage acidobasique du vin.<\/em><\/figcaption><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Elle ajoute avec enthousiasme : \u00ab C&rsquo;est \u00e0 ce moment-l\u00e0 qu&rsquo;on peut calculer l&rsquo;acidit\u00e9 totale du vin. Dans la vid\u00e9o, vous verrez le pH et la couleur changer en direct ! \u00bb.<\/p>\n<\/blockquote>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Une fois l&rsquo;exp\u00e9rience termin\u00e9e, Layla calcule l&rsquo;acidit\u00e9 totale. \u00ab\u00a0<em>0,069 mol\/L ! On est bien au-dessus du minimum l\u00e9gal. Ce vin est parfaitement \u00e9quilibr\u00e9<\/em>,\u00a0\u00bb annonce-t-elle fi\u00e8rement.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">La symphonie gustative des acides<\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u00ab\u00a0L&rsquo;acidit\u00e9 dans le vin, c&rsquo;est comme le sel dans la cuisine. Il en faut juste assez pour rehausser les saveurs, mais pas trop pour ne pas les masquer,\u00a0\u00bb explique leur professeur de chimie.<\/p>\n<\/blockquote>\n\n\n\n<p style=\"font-size:14px\">L&rsquo;acidit\u00e9 du vin est une v\u00e9ritable orchestration chimique :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Acide tartrique : Apporte fra\u00eecheur et structure.<\/li>\n\n\n\n<li>Acide malique : Offre une acidit\u00e9 vive et fruit\u00e9e.<\/li>\n\n\n\n<li>Acide citrique : Ajoute une note de fra\u00eecheur citronn\u00e9e.<\/li>\n<\/ul>\n\n\n\n<p style=\"font-size:16px\">\ud83d\udccc \u00c0 retenir sur l&rsquo;acidit\u00e9 du vin :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Influence directe sur le go\u00fbt et la fra\u00eecheur.<\/li>\n\n\n\n<li>R\u00f4le de conservateur naturel.<\/li>\n\n\n\n<li>Dosage pr\u00e9cis essentiel pour la qualit\u00e9.<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<h1 class=\"wp-block-heading\">L&rsquo;eau oxyg\u00e9n\u00e9e : le gardien invisible de notre sant\u00e9<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Un dosage spectaculaire<\/h2>\n\n\n\n<p>Nos apprentis pharmaciens BIT passent maintenant \u00e0 l&rsquo;analyse de l&rsquo;eau oxyg\u00e9n\u00e9e. Suivons leur protocole :<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Pr\u00e9l\u00e8vement de la solution dilu\u00e9e.<\/li>\n\n\n\n<li>Ajout d&rsquo;eau distill\u00e9e et d&rsquo;acide chlorhydrique.<\/li>\n\n\n\n<li>Titrage avec du permanganate de potassium.<\/li>\n\n\n\n<li>Observation du point d&rsquo;\u00e9quivalence.<\/li>\n\n\n\n<li>Calcul de la concentration.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/www.hdebalzac.fr\/wp-content\/uploads\/2024\/08\/BIT-TP-Chimie-Eau-oxygenee-1024x1024.jpg\" alt=\"\" class=\"wp-image-9881\" srcset=\"https:\/\/www.hdebalzac.fr\/wp-content\/uploads\/2024\/08\/BIT-TP-Chimie-Eau-oxygenee-1024x1024.jpg 1024w, https:\/\/www.hdebalzac.fr\/wp-content\/uploads\/2024\/08\/BIT-TP-Chimie-Eau-oxygenee-300x300.jpg 300w, https:\/\/www.hdebalzac.fr\/wp-content\/uploads\/2024\/08\/BIT-TP-Chimie-Eau-oxygenee-150x150.jpg 150w, https:\/\/www.hdebalzac.fr\/wp-content\/uploads\/2024\/08\/BIT-TP-Chimie-Eau-oxygenee-768x768.jpg 768w, https:\/\/www.hdebalzac.fr\/wp-content\/uploads\/2024\/08\/BIT-TP-Chimie-Eau-oxygenee-1536x1536.jpg 1536w, https:\/\/www.hdebalzac.fr\/wp-content\/uploads\/2024\/08\/BIT-TP-Chimie-Eau-oxygenee-2048x2048.jpg 2048w, https:\/\/www.hdebalzac.fr\/wp-content\/uploads\/2024\/08\/BIT-TP-Chimie-Eau-oxygenee-600x600.jpg 600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><em>Dilution, pr\u00e9l\u00e8vement et dosage.<\/em><\/figcaption><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Briana explique le processus : \u00ab Je dilue et j&rsquo;acidifie l&rsquo;\u00e9chantillon, puis j&rsquo;ajoute du permanganate de potassium goutte par goutte. C&rsquo;est violet au d\u00e9but, mais \u00e7a se d\u00e9colore en r\u00e9agissant. Le moment crucial ? Quand la solution reste l\u00e9g\u00e8rement rose. \u00c7a signifie que toute l&rsquo;eau oxyg\u00e9n\u00e9e a r\u00e9agi \u00bb.<\/p>\n<\/blockquote>\n\n\n\n<figure class=\"wp-block-video\"><video height=\"1440\" style=\"aspect-ratio: 1440 \/ 1440;\" width=\"1440\" controls src=\"https:\/\/www.hdebalzac.fr\/wp-content\/uploads\/2024\/08\/BIT-TP-Chimie-Eau-oxygenee.mp4\"><\/video><figcaption class=\"wp-element-caption\"><em>Dosage d&rsquo;oxydor\u00e9duction de l&rsquo;eau oxyg\u00e9n\u00e9e.<\/em><\/figcaption><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Elle souligne l&rsquo;importance de cette m\u00e9thode : \u00ab \u00c0 partir de l\u00e0, je peux calculer sa concentration exacte. C&rsquo;est important pour s&rsquo;assurer que le produit est efficace et s\u00fbr. Dans la vid\u00e9o, vous verrez la transformation de couleur. C&rsquo;est fascinant \u00e0 observer ! \u00bb.<\/p>\n<\/blockquote>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Rautahi ajoute : \u00ab\u00a0\u00c7a fait 0,9 mol\/L ! C&rsquo;est tr\u00e8s proche des 0,89 mol\/L indiqu\u00e9s pour une solution \u00e0 10 volumes. On a bien v\u00e9rifi\u00e9 la concentration !\u00a0\u00bb<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">H<sub>2<\/sub>O<sub>2<\/sub> : le minuscule pompier mol\u00e9culaire<\/h2>\n\n\n\n<p style=\"font-size:14px\">L&rsquo;eau oxyg\u00e9n\u00e9e est un v\u00e9ritable couteau suisse chimique :<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u00ab\u00a0Le dosage pr\u00e9cis de l&rsquo;eau oxyg\u00e9n\u00e9e est crucial dans de nombreux domaines, de la pharmacie \u00e0 l&rsquo;industrie cosm\u00e9tique,\u00a0\u00bb souligne leur professeur de chimie.<\/p>\n<\/blockquote>\n\n\n\n<h4 class=\"wp-block-heading\">\ud83d\udd2c Applications multiples :<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Cosm\u00e9tique : teintures capillaires, dentifrices blanchissants.<\/li>\n\n\n\n<li>M\u00e9decine : asepsie des plaies.<\/li>\n\n\n\n<li>Industrie : blanchiment du papier, nettoyage des circuits imprim\u00e9s.<\/li>\n\n\n\n<li>Environnement : traitement des eaux us\u00e9es.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\ud83d\udccc \u00c0 retenir sur l&rsquo;eau oxyg\u00e9n\u00e9e :<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Dosage pr\u00e9cis crucial pour l&rsquo;efficacit\u00e9 et la s\u00e9curit\u00e9.<\/li>\n\n\n\n<li>Multiples applications quotidiennes et industrielles.<\/li>\n\n\n\n<li>Pouvoir d\u00e9sinfectant naturel.<\/li>\n<\/ul>\n\n\n\n<p style=\"font-size:14px\"><\/p>\n\n\n\n<h1 class=\"wp-block-heading\">La chimie, gardienne invisible de notre quotidien<\/h1>\n\n\n\n<p>Ces exp\u00e9riences nous montrent comment la chimie veille discr\u00e8tement sur la qualit\u00e9 de nos produits. Du vin que nous savourons \u00e0 l&rsquo;eau oxyg\u00e9n\u00e9e qui nous soigne, les r\u00e9actions chimiques orchestrent silencieusement notre bien-\u00eatre quotidien.<\/p>\n\n\n\n<p>Les comp\u00e9tences acquises par nos futurs op\u00e9rateurs BIT sont cruciales. Elles contribueront demain \u00e0 la qualit\u00e9 de nos aliments, de nos m\u00e9dicaments, et \u00e0 la protection de notre environnement.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Que pouvez-vous faire ?<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Lors de votre prochaine d\u00e9gustation de vin, essayez d&rsquo;identifier les diff\u00e9rentes notes d&rsquo;acidit\u00e9.<\/li>\n\n\n\n<li>V\u00e9rifiez la concentration de votre eau oxyg\u00e9n\u00e9e \u00e0 usage domestique et assurez-vous de l&rsquo;utiliser correctement.<\/li>\n\n\n\n<li>Int\u00e9ressez-vous aux \u00e9tiquettes des produits que vous achetez : vous y trouverez souvent des indices sur leur composition chimique !<\/li>\n<\/ul>\n\n\n\n<p>La prochaine fois que vous utiliserez ces produits, prenez un moment pour appr\u00e9cier la fascinante aventure chimique qui se cache derri\u00e8re. La science est partout, sublimant notre quotidien de mille fa\u00e7ons insoup\u00e7onn\u00e9es !<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img decoding=\"async\" width=\"601\" height=\"571\" src=\"https:\/\/www.hdebalzac.fr\/wp-content\/uploads\/2024\/08\/BIT_logo.jpg\" alt=\"\" class=\"wp-image-9875\" style=\"width:345px;height:auto\" srcset=\"https:\/\/www.hdebalzac.fr\/wp-content\/uploads\/2024\/08\/BIT_logo.jpg 601w, https:\/\/www.hdebalzac.fr\/wp-content\/uploads\/2024\/08\/BIT_logo-300x285.jpg 300w\" sizes=\"(max-width: 601px) 100vw, 601px\" \/><figcaption class=\"wp-element-caption\"><em>Logo Bio-Industries de Transformation.<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Avez-vous d\u00e9j\u00e0 r\u00e9fl\u00e9chi \u00e0 la science cach\u00e9e derri\u00e8re votre verre de vin pr\u00e9f\u00e9r\u00e9 ? Ou \u00e0 la pr\u00e9cision n\u00e9cessaire pour que votre d\u00e9sinfectant soit efficace sans \u00eatre dangereux ? Plongeons [&hellip;]<\/p>\n","protected":false},"author":19,"featured_media":9876,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"0","ocean_second_sidebar":"0","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"0","ocean_custom_header_template":"0","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"0","ocean_menu_typo_font_family":"0","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"0","omw_enable_modal_window":"enable","ocean_post_oembed":"","ocean_post_self_hosted_media":"","ocean_post_video_embed":"","ocean_link_format":"","ocean_link_format_target":"self","ocean_quote_format":"","ocean_quote_format_link":"post","ocean_gallery_link_images":"on","ocean_gallery_id":[],"footnotes":""},"categories":[9,3],"tags":[50,49,38,23],"class_list":["post-9850","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-developpement-durable","category-formation","tag-bac-pro","tag-bit","tag-chimie","tag-travaux-pratiques","entry","has-media"],"jetpack_featured_media_url":"https:\/\/www.hdebalzac.fr\/wp-content\/uploads\/2024\/08\/Vin_blanc_vignes.png","views":"","publishpress_future_action":{"enabled":false,"date":"2026-04-28 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