{"id":7468,"date":"2021-07-23T10:09:49","date_gmt":"2021-07-23T14:09:49","guid":{"rendered":"https:\/\/cieau.org\/articles\/experience-scientifique-couleur-qui-disparait\/"},"modified":"2021-07-23T10:09:49","modified_gmt":"2021-07-23T14:09:49","slug":"experience-scientifique-couleur-qui-disparait","status":"publish","type":"post","link":"https:\/\/www.cieau.org\/en\/articles\/experience-scientifique-couleur-qui-disparait\/","title":{"rendered":"Exp\u00e9rience scientifique: la couleur qui disparait"},"content":{"rendered":"<p>Avez-vous d\u00e9j\u00e0 entendu la fameuse phrase\u00a0: \u00ab Rien ne se perd, rien ne se cr\u00e9e, tout se transforme \u00bb? Cette exp\u00e9rience scientifique a l\u2019air magique, car elle porte \u00e0 croire que la couleur dispara\u00eet, alors que ce n\u2019est pas possible! Que se passe-t-il donc?<\/p>\n<p>Temps de r\u00e9alisation: 5 \u00e0 10 minutes<\/p>\n<h2>Informations sur la s\u00e9curit\u00e9<\/h2>\n<p><strong>La surveillance d\u2019un adulte est obligatoire pour la manipulation de l\u2019eau de javel:<\/strong><\/p>\n<ul>\n<li>L\u2019eau de javel est un produit corrosif\u00a0: ne pas ing\u00e9rer ou inspirer. Assurez-vous de lire les pr\u00e9cautions sur le contenant avant de l\u2019utiliser<\/li>\n<li>Porter des gants et des lunettes de s\u00e9curit\u00e9 lors des manipulations<\/li>\n<li>Porter un sarrau\u00a0puisque l\u2019eau de javel est un javellisant et qu\u2019il peut d\u00e9colorer les v\u00eatements<\/li>\n<\/ul>\n<p>En cas de contact avec la peau ou les v\u00eatements, rincez imm\u00e9diatement avec de l\u2019eau et en cas d\u2019ingestion contactez le <a href=\"https:\/\/www.ciusss-capitalenationale.gouv.qc.ca\/services\/urgence\/capq\" target=\"_blank\" rel=\"noopener\">Centre Antipoison du Qu\u00e9bec<\/a>.<\/p>\n<h2>Mat\u00e9riel<\/h2>\n<ul>\n<li>100ml &#8211; 150 ml (\u00b11\/2 tasse) d\u2019eau de Javel;<\/li>\n<li>Tasse \u00e0 mesurer;<\/li>\n<li>Colorant alimentaire;<\/li>\n<li>Verre, bocal ou tout autre contenant transparent;<\/li>\n<li>Entonnoir;<\/li>\n<li>Eau;<\/li>\n<li>Gants;<\/li>\n<li>Bicarbonate de soude;<\/li>\n<li>Recommand\u00e9\u00a0: napperon (pour prot\u00e9ger la surface lors de la manipulation de l\u2019eau de javel).<\/li>\n<\/ul>\n<h2>\u00c9tapes de r\u00e9alisation<\/h2>\n<p>1. Remplir le contenant transparent \u00e0 moiti\u00e9 d\u2019eau ;<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone wp-image-2724 size-medium\" src=\"https:\/\/cieau.webloft.dev\/wp-content\/uploads\/2021\/07\/224670346_520729629231598_1192011182545214668_n-225x300.jpg\" alt=\"\" width=\"225\" height=\"300\" \/><\/p>\n<p>2. Ajoutez quelques gouttes de colorant alimentaire au choix dans l\u2019eau. Remuez le liquide pour bien m\u00e9langer;<\/p>\n<p><img decoding=\"async\" class=\"alignnone wp-image-6089 size-medium\" src=\"https:\/\/www.cieau.org\/wp-content\/uploads\/2021\/07\/224287046_1559024307768277_8142032206657046045_n-225x300.jpg\" alt=\"\" width=\"225\" height=\"300\" srcset=\"https:\/\/www.cieau.org\/wp-content\/uploads\/2021\/07\/224287046_1559024307768277_8142032206657046045_n-225x300.jpg 225w, https:\/\/www.cieau.org\/wp-content\/uploads\/2021\/07\/224287046_1559024307768277_8142032206657046045_n.jpg 600w\" sizes=\"(max-width: 225px) 100vw, 225px\" \/><\/p>\n<p><img decoding=\"async\" class=\"alignnone wp-image-6090 size-medium\" src=\"https:\/\/www.cieau.org\/wp-content\/uploads\/2021\/07\/224814623_546304663083877_3178357255572863458_n-225x300.jpg\" alt=\"\" width=\"225\" height=\"300\" srcset=\"https:\/\/www.cieau.org\/wp-content\/uploads\/2021\/07\/224814623_546304663083877_3178357255572863458_n-225x300.jpg 225w, https:\/\/www.cieau.org\/wp-content\/uploads\/2021\/07\/224814623_546304663083877_3178357255572863458_n.jpg 600w\" sizes=\"(max-width: 225px) 100vw, 225px\" \/><\/p>\n<p>3. Mesurer une demi-tasse d\u2019eau de javel \u00e0 l\u2019aide d\u2019une tasse \u00e0 mesurer tout en portant des gants;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-6091 size-medium\" src=\"https:\/\/www.cieau.org\/wp-content\/uploads\/2021\/07\/224506759_361239848724946_7314776735050419550_n-225x300.jpg\" alt=\"\" width=\"225\" height=\"300\" srcset=\"https:\/\/www.cieau.org\/wp-content\/uploads\/2021\/07\/224506759_361239848724946_7314776735050419550_n-225x300.jpg 225w, https:\/\/www.cieau.org\/wp-content\/uploads\/2021\/07\/224506759_361239848724946_7314776735050419550_n.jpg 600w\" sizes=\"(max-width: 225px) 100vw, 225px\" \/><\/p>\n<p>4. Avec pr\u00e9caution, versez l\u2019eau de javel dans l\u2019eau color\u00e9e \u00e0 l\u2019aide d\u2019un entonnoir pour \u00e9viter les \u00e9claboussures.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-6092 size-medium\" src=\"https:\/\/www.cieau.org\/wp-content\/uploads\/2021\/07\/225372775_887441318514769_4909717920119379840_n-225x300.jpg\" alt=\"\" width=\"225\" height=\"300\" srcset=\"https:\/\/www.cieau.org\/wp-content\/uploads\/2021\/07\/225372775_887441318514769_4909717920119379840_n-225x300.jpg 225w, https:\/\/www.cieau.org\/wp-content\/uploads\/2021\/07\/225372775_887441318514769_4909717920119379840_n.jpg 600w\" sizes=\"(max-width: 225px) 100vw, 225px\" \/><\/p>\n<p>5. Vous pouvez m\u00e9langer le contenu avec une petite cuill\u00e8re si vous le souhaitez. Continuez jusqu\u2019\u00e0 ce que la couleur disparaisse.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-6093 size-medium\" src=\"https:\/\/www.cieau.org\/wp-content\/uploads\/2021\/07\/229313729_337102698163846_7893026556853440032_n-169x300.jpg\" alt=\"\" width=\"169\" height=\"300\" srcset=\"https:\/\/www.cieau.org\/wp-content\/uploads\/2021\/07\/229313729_337102698163846_7893026556853440032_n-169x300.jpg 169w, https:\/\/www.cieau.org\/wp-content\/uploads\/2021\/07\/229313729_337102698163846_7893026556853440032_n-576x1024.jpg 576w, https:\/\/www.cieau.org\/wp-content\/uploads\/2021\/07\/229313729_337102698163846_7893026556853440032_n.jpg 600w\" sizes=\"(max-width: 169px) 100vw, 169px\" \/><\/p>\n<h2>Explication scientifique<\/h2>\n<p>L\u2019eau de javel est un produit chimique qui contient de <strong>l\u2019hypochlorite de sodium<\/strong> dilu\u00e9 dans de l\u2019eau. Il a un <strong>pH <\/strong>tr\u00e8s basique de plus 11.<\/p>\n<p>L\u2019eau de javel est un <strong>oxydant <\/strong>qui peut r\u00e9agir avec certaines mol\u00e9cules color\u00e9es. En effet, elle modifie la structure des mol\u00e9cules de certains colorants, comme le colorant artificiel dans notre cas.<\/p>\n<p>Les <strong>mol\u00e9cules <\/strong>ne disparaissent pas\u00a0: leur forme change de sorte qu\u2019elles ne r\u00e9fl\u00e9chissent plus la lumi\u00e8re de la m\u00eame mani\u00e8re. D\u2019o\u00f9 l\u2019expression \u00ab\u00a0Rien ne se perd, rien ne se cr\u00e9e, tout se transforme\u00a0\u00bb! Elles perdent donc leur couleur et cela se traduit initialement par des couleurs fan\u00e9es puisque la r\u00e9action prend du temps \u00e0 se compl\u00e9ter.<\/p>\n<h2>Pour aller plus loin<\/h2>\n<ul>\n<li>Essayez d\u2019ajouter plus de colorant alimentaire dans le contenant maintenant que toute la couleur a disparu. Il n\u2019agira pas de la m\u00eame mani\u00e8re qu\u2019au d\u00e9but.<\/li>\n<li>Vous pouvez ajouter du bicarbonate de soude dans le contenant pour que la r\u00e9action chimique se produise plus rapidement.<\/li>\n<li>Explorez les symboles indicateurs de danger sur diff\u00e9rents produites domestiques, comme l\u2019eau de javel (inflammable, poison, explosif, etc.)<\/li>\n<\/ul>\n<h2>FAQ<\/h2>\n<p><strong>Pour quel groupe d\u2019\u00e2ge l\u2019activit\u00e9 est recommand\u00e9e?<\/strong><\/p>\n<p>Un adulte doit effectuer les manipulations au niveau de l\u2019eau de javel. La partie coloration peut toutefois tr\u00e8s bien \u00eatre r\u00e9alis\u00e9e par les enfants d\u00e8s l\u2019\u00e2ge de 6 ans!<\/p>\n<p><strong>Pourquoi la couleur ne disparait pas?<\/strong><\/p>\n<p>Si tel est le cas, r\u00e9essayer avec une plus petite quantit\u00e9 d\u2019eau dans votre r\u00e9cipient afin que l\u2019effet du jav\u00e9lisant soit visible plus rapidement. Vous pouvez \u00e9galement attendre quelques minutes, car la r\u00e9action chimique prend un peu de temps.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Avez-vous d\u00e9j\u00e0 entendu la fameuse phrase\u00a0: \u00ab Rien ne se perd, rien ne se cr\u00e9e, tout se transforme \u00bb? Cette exp\u00e9rience scientifique a l\u2019air magique, car elle porte \u00e0 croire que la couleur dispara\u00eet, alors que ce n\u2019est pas possible! Que se passe-t-il donc?<\/p>\n","protected":false},"author":13,"featured_media":6193,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[67],"tags":[],"class_list":["post-7468","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: la couleur qui disparait - 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-couleur-qui-disparait\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Exp\u00e9rience scientifique: la couleur qui disparait - C.I.Eau\" \/>\n<meta property=\"og:description\" content=\"Avez-vous d\u00e9j\u00e0 entendu la fameuse phrase\u00a0: \u00ab Rien ne se perd, rien ne se cr\u00e9e, tout se transforme \u00bb? Cette exp\u00e9rience scientifique a l\u2019air magique, car elle porte \u00e0 croire que la couleur dispara\u00eet, alors que ce n\u2019est pas possible! 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Cette exp\u00e9rience scientifique a l\u2019air magique, car elle porte \u00e0 croire que la couleur dispara\u00eet, alors que ce n\u2019est pas possible! Que se passe-t-il donc?","og_url":"https:\/\/www.cieau.org\/en\/articles\/experience-scientifique-couleur-qui-disparait\/","og_site_name":"C.I.Eau","article_publisher":"https:\/\/www.facebook.com\/C.I.EAU","article_published_time":"2021-07-23T14:09:49+00:00","og_image":[{"width":750,"height":1000,"url":"https:\/\/www.cieau.org\/wp-content\/uploads\/2021\/07\/225372775_887441318514769_4909717920119379840_n-1.jpg","type":"image\/jpeg"}],"author":"cieau","twitter_card":"summary_large_image","twitter_misc":{"Written by":"cieau","Est. reading time":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.cieau.org\/en\/articles\/experience-scientifique-couleur-qui-disparait\/#article","isPartOf":{"@id":"https:\/\/www.cieau.org\/en\/articles\/experience-scientifique-couleur-qui-disparait\/"},"author":{"name":"cieau","@id":"https:\/\/www.cieau.org\/en\/#\/schema\/person\/edb30567dc555737f5af8fff40c16cb4"},"headline":"Exp\u00e9rience scientifique: la couleur qui disparait","datePublished":"2021-07-23T14:09:49+00:00","mainEntityOfPage":{"@id":"https:\/\/www.cieau.org\/en\/articles\/experience-scientifique-couleur-qui-disparait\/"},"wordCount":608,"publisher":{"@id":"https:\/\/www.cieau.org\/en\/#organization"},"image":{"@id":"https:\/\/www.cieau.org\/en\/articles\/experience-scientifique-couleur-qui-disparait\/#primaryimage"},"thumbnailUrl":"https:\/\/www.cieau.org\/wp-content\/uploads\/2021\/07\/225372775_887441318514769_4909717920119379840_n-1.jpg","articleSection":["Scientific experiments"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.cieau.org\/en\/articles\/experience-scientifique-couleur-qui-disparait\/","url":"https:\/\/www.cieau.org\/en\/articles\/experience-scientifique-couleur-qui-disparait\/","name":"Exp\u00e9rience scientifique: la couleur qui disparait - 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