{"id":4098,"date":"2018-04-25T15:28:37","date_gmt":"2018-04-25T13:28:37","guid":{"rendered":"http:\/\/agora.xtec.cat\/insjoancoromines\/?p=4098"},"modified":"2018-04-25T15:29:13","modified_gmt":"2018-04-25T13:29:13","slug":"assaig-a-la-flama","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/insjoancoromines\/eso\/assaig-a-la-flama\/","title":{"rendered":"Assaig a la flama"},"content":{"rendered":"<p><span lang=\"CA\">Aquesta setmana els nostres aprenents de qu\u00edmica de 3r d&#8217;ESO han fet la pr\u00e0ctica de l&#8217;<\/span>assaig a la flama, un procediment usat en qu\u00edmica anal\u00edtica per a detectar la pres\u00e8ncia de certs metalls en les mostres estudiades. Quan els metalls alcalins o alcalinoterris o els seus compostos es posen a la flama d&#8217;un bec de Bunsen, emeten llum de diferents colors, caracter\u00edstics de cada metall que permet identificar-los. A m\u00e9s a m\u00e9s, aquesta pr\u00e0ctica els ha perm\u00e8s entendre per qu\u00e8 els focs artificials poden tenir diferents coloracions, ja que segons amb quin compost qu\u00edmic es barregi la p\u00f3lvora s&#8217;obt\u00e9 una palmera o una font d&#8217;un color o un altre.<\/p>\n<table>\n<tbody>\n<tr>\n<td><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-4101\" src=\"http:\/\/agora.xtec.cat\/insjoancoromines\/wp-content\/uploads\/usu91\/2018\/04\/IMG_20180412_140259.jpg\" alt=\"\" width=\"1200\" height=\"900\" srcset=\"https:\/\/agora.xtec.cat\/insjoancoromines\/wp-content\/uploads\/usu91\/2018\/04\/IMG_20180412_140259.jpg 1200w, https:\/\/agora.xtec.cat\/insjoancoromines\/wp-content\/uploads\/usu91\/2018\/04\/IMG_20180412_140259-300x225.jpg 300w, https:\/\/agora.xtec.cat\/insjoancoromines\/wp-content\/uploads\/usu91\/2018\/04\/IMG_20180412_140259-768x576.jpg 768w, https:\/\/agora.xtec.cat\/insjoancoromines\/wp-content\/uploads\/usu91\/2018\/04\/IMG_20180412_140259-1024x768.jpg 1024w, https:\/\/agora.xtec.cat\/insjoancoromines\/wp-content\/uploads\/usu91\/2018\/04\/IMG_20180412_140259-200x150.jpg 200w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/td>\n<td><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-4099\" src=\"http:\/\/agora.xtec.cat\/insjoancoromines\/wp-content\/uploads\/usu91\/2018\/04\/IMG_20180412_135352.jpg\" alt=\"\" width=\"1200\" height=\"900\" srcset=\"https:\/\/agora.xtec.cat\/insjoancoromines\/wp-content\/uploads\/usu91\/2018\/04\/IMG_20180412_135352.jpg 1200w, https:\/\/agora.xtec.cat\/insjoancoromines\/wp-content\/uploads\/usu91\/2018\/04\/IMG_20180412_135352-300x225.jpg 300w, https:\/\/agora.xtec.cat\/insjoancoromines\/wp-content\/uploads\/usu91\/2018\/04\/IMG_20180412_135352-768x576.jpg 768w, https:\/\/agora.xtec.cat\/insjoancoromines\/wp-content\/uploads\/usu91\/2018\/04\/IMG_20180412_135352-1024x768.jpg 1024w, https:\/\/agora.xtec.cat\/insjoancoromines\/wp-content\/uploads\/usu91\/2018\/04\/IMG_20180412_135352-200x150.jpg 200w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/td>\n<td><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-4100\" src=\"http:\/\/agora.xtec.cat\/insjoancoromines\/wp-content\/uploads\/usu91\/2018\/04\/IMG_20180412_140118.jpg\" alt=\"\" width=\"1200\" height=\"900\" srcset=\"https:\/\/agora.xtec.cat\/insjoancoromines\/wp-content\/uploads\/usu91\/2018\/04\/IMG_20180412_140118.jpg 1200w, https:\/\/agora.xtec.cat\/insjoancoromines\/wp-content\/uploads\/usu91\/2018\/04\/IMG_20180412_140118-300x225.jpg 300w, https:\/\/agora.xtec.cat\/insjoancoromines\/wp-content\/uploads\/usu91\/2018\/04\/IMG_20180412_140118-768x576.jpg 768w, https:\/\/agora.xtec.cat\/insjoancoromines\/wp-content\/uploads\/usu91\/2018\/04\/IMG_20180412_140118-1024x768.jpg 1024w, https:\/\/agora.xtec.cat\/insjoancoromines\/wp-content\/uploads\/usu91\/2018\/04\/IMG_20180412_140118-200x150.jpg 200w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p>3r d&#8217;ESO ha fet la pr\u00e0ctica de l&#8217;assaig a la flama, un procediment usat en qu\u00edmica anal\u00edtica per a detectar la pres\u00e8ncia de certs metalls en les mostres estudiades.&hellip;  <a href=\"https:\/\/agora.xtec.cat\/insjoancoromines\/eso\/assaig-a-la-flama\/\" title=\"Read Assaig a la flama\">Llegeix m\u00e9s\u00bb<\/a><\/p>\n","protected":false},"author":1,"featured_media":4104,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":""},"categories":[3,6,29],"tags":[],"class_list":["post-4098","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-eso","category-eso-3","category-portada"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/agora.xtec.cat\/insjoancoromines\/wp-json\/wp\/v2\/posts\/4098","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agora.xtec.cat\/insjoancoromines\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agora.xtec.cat\/insjoancoromines\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/insjoancoromines\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/insjoancoromines\/wp-json\/wp\/v2\/comments?post=4098"}],"version-history":[{"count":2,"href":"https:\/\/agora.xtec.cat\/insjoancoromines\/wp-json\/wp\/v2\/posts\/4098\/revisions"}],"predecessor-version":[{"id":4106,"href":"https:\/\/agora.xtec.cat\/insjoancoromines\/wp-json\/wp\/v2\/posts\/4098\/revisions\/4106"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/insjoancoromines\/wp-json\/wp\/v2\/media\/4104"}],"wp:attachment":[{"href":"https:\/\/agora.xtec.cat\/insjoancoromines\/wp-json\/wp\/v2\/media?parent=4098"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agora.xtec.cat\/insjoancoromines\/wp-json\/wp\/v2\/categories?post=4098"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agora.xtec.cat\/insjoancoromines\/wp-json\/wp\/v2\/tags?post=4098"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}