{"id":1432,"date":"2023-11-30T08:41:31","date_gmt":"2023-11-30T06:41:31","guid":{"rendered":"https:\/\/blog.edu.turku.fi\/scienceed\/?p=1432"},"modified":"2025-12-23T11:11:45","modified_gmt":"2025-12-23T09:11:45","slug":"slack-ljuset","status":"publish","type":"post","link":"https:\/\/blog.edu.turku.fi\/scienceed\/2023\/11\/30\/slack-ljuset\/","title":{"rendered":"Sl\u00e4ck ljuset"},"content":{"rendered":"<p><em>Trixa med julljusen.<\/em><\/p>\n<h2>Material<\/h2>\n<ul>\n<li>ljus<\/li>\n<li>t\u00e4ndstickor<\/li>\n<li>kanna,<\/li>\n<li>\u00e4ttika<\/li>\n<li>bikarbonat (bakningssoda)<\/li>\n<\/ul>\n<h2>Genomf\u00f6rande<\/h2>\n<ul>\n<li><strong>Steg 1:<\/strong> T\u00e4nd ljuset.\u00a0 H\u00e4ll n\u00e5gra deciliter \u00e4ttika i kannan.<\/li>\n<li><strong>Steg 2: <\/strong>S\u00e4tt n\u00e5gra teskedar bikarbonat och r\u00f6r om.<\/li>\n<li><strong>Steg 3: <\/strong>Luta kannan f\u00f6rsiktigt mot ljuset, utan att v\u00e4tskan kommer ut.\u00a0 Lyckas du sl\u00e4cka ljuset?<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-1430\" src=\"https:\/\/blog.edu.turku.fi\/scienceed\/files\/2023\/11\/Bild1-3-300x200.jpg\" alt=\"\" width=\"300\" height=\"200\" srcset=\"https:\/\/blog.edu.turku.fi\/scienceed\/files\/2023\/11\/Bild1-3-300x200.jpg 300w, https:\/\/blog.edu.turku.fi\/scienceed\/files\/2023\/11\/Bild1-3.jpg 1003w\" sizes=\"auto, (max-width: 300px) 85vw, 300px\" \/><\/p>\n<h2>Vad h\u00e4nde?<\/h2>\n<p>D\u00e5 du tills\u00e4tter sodan i \u00e4ttikan h\u00e4nder det en kemisk reaktion. Reaktionen bildar vatten och koldioxid gas. Gasen \u00e4r tyngre \u00e4n luft och sjunker ner\u00e5t. Vi kan inte se gasen, vilket f\u00e5r det att se magiskt ut. D\u00e5 du lutar kannan mot ljuset kommer en del av gasen ut, eftersom gasen \u00e4r tyngre \u00e4n luft s\u00e5 trycker den ner luften och kv\u00e4ver l\u00e5gan. Koldioxidgas \u00e4r en produkt av f\u00f6rbr\u00e4nning, d\u00e4rf\u00f6r brinner inte koldioxidgas, utan klarar av att sl\u00e4cka ljuset. Andra gaser, liksom syre har en egenskap att f\u00e5 elden att leva. T.ex. d\u00e5 du bl\u00e5ser p\u00e5 en brasa s\u00e5 brinner den b\u00e4ttre f\u00f6r att du tillf\u00f6r syre i elden.<br \/>\nLuften inneh\u00e5ller 21% syre och den luft vi andas ut 16% syre.<\/p>\n<p><em>Tips fr\u00e5n Heurekas Experimentfabrik <\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Trixa med julljusen. Material ljus t\u00e4ndstickor kanna, \u00e4ttika bikarbonat (bakningssoda) Genomf\u00f6rande Steg 1: T\u00e4nd ljuset.\u00a0 H\u00e4ll n\u00e5gra deciliter \u00e4ttika i kannan. Steg 2: S\u00e4tt n\u00e5gra teskedar bikarbonat och r\u00f6r om. Steg 3: Luta kannan f\u00f6rsiktigt mot ljuset, utan att v\u00e4tskan kommer ut.\u00a0 Lyckas du sl\u00e4cka ljuset? Vad h\u00e4nde? D\u00e5 du tills\u00e4tter sodan i \u00e4ttikan h\u00e4nder &hellip; <a href=\"https:\/\/blog.edu.turku.fi\/scienceed\/2023\/11\/30\/slack-ljuset\/\" class=\"more-link\">Forts\u00e4tt l\u00e4sa<span class=\"screen-reader-text\"> \u201dSl\u00e4ck ljuset\u201d<\/span><\/a><\/p>\n","protected":false},"author":2590,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[218561,4843,218347],"tags":[],"class_list":["post-1432","post","type-post","status-publish","format-standard","hentry","category-experiment","category-kemi","category-veckans-ide"],"_links":{"self":[{"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/posts\/1432","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/users\/2590"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/comments?post=1432"}],"version-history":[{"count":2,"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/posts\/1432\/revisions"}],"predecessor-version":[{"id":1858,"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/posts\/1432\/revisions\/1858"}],"wp:attachment":[{"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/media?parent=1432"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/categories?post=1432"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/tags?post=1432"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}