{"id":7466,"date":"2021-09-17T10:10:05","date_gmt":"2021-09-17T14:10:05","guid":{"rendered":"https:\/\/cieau.org\/articles\/experience-scientifique-echelle-ph-maison\/"},"modified":"2025-04-01T10:37:50","modified_gmt":"2025-04-01T14:37:50","slug":"experience-scientifique-echelle-ph-maison","status":"publish","type":"post","link":"https:\/\/www.cieau.org\/en\/articles\/experience-scientifique-echelle-ph-maison\/","title":{"rendered":"Exp\u00e9rience scientifique: \u00e9chelle de pH maison"},"content":{"rendered":"<p>G\u00e9n\u00e9ralement, on dit de ne pas jouer avec sa nourriture, mais aujourd\u2019hui vous allez faire de la science avec du chou!<\/p>\n<p>Temps de r\u00e9alisation: 15-20 minutes<\/p>\n<h2>Informations sur la s\u00e9curit\u00e9<\/h2>\n<p>L\u2019utilisation du four pour pr\u00e9parer le jus de chou n\u00e9cessite l\u2019intervention d\u2019un adulte\u00a0:<\/p>\n<ul>\n<li>L\u2019adulte doit manipuler la casserole avec des mitaines de four et \u00eatre prudent pour \u00e9viter les br\u00fblures.<\/li>\n<li>L\u2019adulte doit se charger de la coupe du chou pour les enfants de moins de 12 ans pour \u00e9viter les coupures.<\/li>\n<\/ul>\n<h2>Mat\u00e9riel<\/h2>\n<ul>\n<li>2 petits verres ou bols transparents r\u00e9sistants \u00e0 la chaleur ;<\/li>\n<li>1 tasse de chou rouge d\u00e9coup\u00e9 en morceaux ;<\/li>\n<li>Planche \u00e0 d\u00e9couper ;<\/li>\n<li>Couteau ;<\/li>\n<li>Tasse \u00e0 mesurer ;<\/li>\n<li>Eau ;<\/li>\n<li>Vinaigre (environ une cuill\u00e8re \u00e0 th\u00e9) ;<\/li>\n<li>Bicarbonate de soude (environ une cuill\u00e8re \u00e0 th\u00e9) ;<\/li>\n<li>Tamis ;<\/li>\n<li>Casserole ;<\/li>\n<li>Grand bol.<\/li>\n<\/ul>\n<h2>\u00c9tapes de r\u00e9alisation<\/h2>\n<p>1. Couper le chou en petits morceaux et le d\u00e9poser dans la casserole ;<\/p>\n<p><img decoding=\"async\" class=\"alignnone wp-image-2698 size-full\" src=\"https:\/\/www.cieau.org\/wp-content\/uploads\/2021\/07\/232162849_805278050111720_2426523154644187363_n.jpg\" alt=\"\" width=\"165\" height=\"220\" \/><\/p>\n<p>2. Recouvrir le chou d\u2019une bonne quantit\u00e9 d\u2019eau et faire bouillir le m\u00e9lange ;<\/p>\n<p><img decoding=\"async\" class=\"alignnone wp-image-2699 size-full\" src=\"https:\/\/www.cieau.org\/wp-content\/uploads\/2021\/07\/231325103_334054548457019_6484661857817389686_n.jpg\" alt=\"\" width=\"165\" height=\"220\" \/><\/p>\n<p>3. Laisser l\u2019eau fr\u00e9mir de 3 \u00e0 4 minutes ;<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-2700\" src=\"https:\/\/www.cieau.org\/wp-content\/uploads\/2021\/07\/231792382_574334260237623_1573182396327656066_n.jpg\" alt=\"\" width=\"165\" height=\"220\" \/><\/p>\n<p>4. Filtrer le contenu de la casserole pour r\u00e9colter le jus de chou ;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2701\" src=\"https:\/\/www.cieau.org\/wp-content\/uploads\/2021\/07\/231409233_319788353219577_6113660848328380637_n.jpg\" alt=\"\" width=\"220\" height=\"220\" srcset=\"https:\/\/www.cieau.org\/wp-content\/uploads\/2021\/07\/231409233_319788353219577_6113660848328380637_n.jpg 220w, https:\/\/www.cieau.org\/wp-content\/uploads\/2021\/07\/231409233_319788353219577_6113660848328380637_n-150x150.jpg 150w\" sizes=\"(max-width: 220px) 100vw, 220px\" \/><\/p>\n<p>5. Verser un peu de jus de chou dans les deux petits verres ou bols ;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2702\" src=\"https:\/\/www.cieau.org\/wp-content\/uploads\/2021\/07\/231844335_362419025525976_8530962576936822348_n.jpg\" alt=\"\" width=\"165\" height=\"220\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>6. Ajouter du vinaigre dans l\u2019un deux ;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2703\" src=\"https:\/\/www.cieau.org\/wp-content\/uploads\/2021\/07\/230814473_527758708427949_927086742576638732_n.jpg\" alt=\"\" width=\"165\" height=\"220\" \/><\/p>\n<p>7. Ajouter du bicarbonate de soude dans le second ;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2704\" src=\"https:\/\/www.cieau.org\/wp-content\/uploads\/2021\/07\/231438222_265471545050691_1231723952235262092_n.jpg\" alt=\"\" width=\"165\" height=\"220\" \/><\/p>\n<p>8. Observer: que se passe-t-il dans chacun des verres?<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2705\" src=\"https:\/\/www.cieau.org\/wp-content\/uploads\/2021\/07\/227854174_503456524097120_83424389144445170_n.jpg\" alt=\"\" width=\"165\" height=\"220\" \/><\/p>\n<h2>Explication scientifique<\/h2>\n<p>Un des sens que l\u2019humain poss\u00e8de est le go\u00fbt. Il lui permet d\u2019\u00e9valuer divers. Certains ont un go\u00fbt acide et d\u2019autres un go\u00fbt plut\u00f4t amer. En fait, ces go\u00fbts sont attribu\u00e9s \u00e0 un caract\u00e8re sp\u00e9cial des solutions que sont les <strong>acides <\/strong>et les <strong>bases<\/strong>.<\/p>\n<p>Les bases lib\u00e8rent des <strong>ions <\/strong>OH- et les acides des ions H+. Ce sont ces ions qui vont r\u00e9agir avec le jus de chou rouge et alt\u00e9rer sa couleur. Le vinaigre donne une teinte ros\u00e9e au jus de chou rouge puisque c\u2019est un acide. Le bicarbonate de soude, quant \u00e0 lui, donne une teinte bleut\u00e9e au jus de chou rouge puisque c\u2019est une base. Le jus de chou rouge est donc un <strong>indicateur de pH <\/strong>naturel puisqu\u2019il nous permet de savoir si le m\u00e9lange est acide, basique ou neutre gr\u00e2ce \u00e0 la couleur.<\/p>\n<h2>Pour aller plus loin<\/h2>\n<p>Vous pouvez tester diff\u00e9rents aliments que vous avez \u00e0 la maison et tenter de deviner s\u2019ils sont acides, basiques ou neutres!<\/p>\n<h2>FAQ<\/h2>\n<p><strong>Pour quel groupe d\u2019\u00e2ge l\u2019activit\u00e9 est recommand\u00e9e?<\/strong><\/p>\n<p>Cette activit\u00e9 peut se faire avec de jeunes enfants, car ils appr\u00e9cieront le changement de couleur, mais les explications de bases, acides et pH sont vues au premier cycle du secondaire.<\/p>\n<p><strong>Comment expliquer ce qui se passe \u00e0 mon tout-petit?<\/strong><\/p>\n<p>Tout se passe au niveau atomique, c\u2019est-\u00e0-dire qu\u2019on ne voit pas ce qui se passe quand les deux liquides se m\u00e9lange. Tout ce qu\u2019on connait est compos\u00e9 d\u2019atomes et ces atomes peuvent s\u2019organiser diff\u00e9remment lorsque qu\u2019ils r\u00e9agissent avec d\u2019autres solutions. Ici, le chou rouge r\u00e9agit avec le vinaigre et le bicarbonate de soude, mais on a encore les m\u00eames composantes dans le verre.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>G\u00e9n\u00e9ralement, on dit de ne pas jouer avec sa nourriture, mais aujourd\u2019hui vous allez faire de la science avec du chou!<\/p>\n","protected":false},"author":13,"featured_media":6191,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[67],"tags":[],"class_list":["post-7466","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-scientific-experiments"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Exp\u00e9rience scientifique: \u00e9chelle de pH maison - C.I.Eau<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.cieau.org\/en\/articles\/experience-scientifique-echelle-ph-maison\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Exp\u00e9rience scientifique: \u00e9chelle de pH maison - 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