{"id":9030,"date":"2026-01-23T22:50:19","date_gmt":"2026-01-23T21:50:19","guid":{"rendered":"https:\/\/agora.xtec.cat\/iesllagostera\/?p=9030"},"modified":"2026-01-23T22:56:01","modified_gmt":"2026-01-23T21:56:01","slug":"acids-i-bases-cromatografia-optativa-de-jardineria-3r-deso","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/iesllagostera\/general\/acids-i-bases-cromatografia-optativa-de-jardineria-3r-deso\/","title":{"rendered":"\u00c0cids i bases &#8211; Cromatografia &#8211; Optativa de jardineria 3r d&#8217;ESO"},"content":{"rendered":"<div>Els dies de pluja ens dificulten poder sortir a l&#8217;aire lliure, a gaudir de la natura, a treballar en el nostre hort o b\u00e9 a fer el manteniment dels jardins de l&#8217;institut. Per\u00f2 tamb\u00e9 ens han estat \u00fatils per fer pr\u00e0ctiques al laboratori de Biologia. La primera va consistir en elaborar un indicador de pH a trav\u00e9s del suc de la col llombarda. Els alumnes van poder entendre un concepte tan important com \u00e9s el pH d&#8217;una subst\u00e0ncia i poder-lo caracteritzar a trav\u00e9s del suc de col llombarda i en van poder extreure diverses conclusions: les subst\u00e0ncies \u00e0cides agafaven tonalitats vermelloses, liles o morades i les b\u00e0siques, tonalitats verdoses o blaves. Si la subst\u00e0ncia era molt alcalina, la tonalitat era groga. La segona pr\u00e0ctica que vam fer va consistir en fer una extracci\u00f3 de pigments fotosint\u00e8tics de la col llombarda i dels espinacs. Els alumnes se&#8217;n van adonar que les coloracions de les fulles i dels fruits de diverses plantes que ens mengem, s\u00f3n deguts a pigments de diversos tipus i que existeix una t\u00e8cnica anomenada cromatografia que permet separar-los per identificar-los. Podeu veure totes les activitats que es fan a l&#8217;optativa de jardineria en el recull de fotografies que trobareu clicant <a href=\"https:\/\/photos.app.goo.gl\/CibkztDtadJ7STuf6\">AQU\u00cd<\/a>!<\/div>\n<div><\/div>\n<div><\/div>\n<div><\/div>\n<div><\/div>\n<div><\/div>\n<div><\/div>\n<div><a href=\"https:\/\/agora.xtec.cat\/iesllagostera\/wp-content\/uploads\/usu1990\/2026\/01\/2BDC6E14-AD87-4922-9F2C-7AFDAD93F0DD.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-9031 aligncenter\" src=\"https:\/\/agora.xtec.cat\/iesllagostera\/wp-content\/uploads\/usu1990\/2026\/01\/2BDC6E14-AD87-4922-9F2C-7AFDAD93F0DD.jpg\" alt=\"\" width=\"329\" height=\"329\" srcset=\"https:\/\/agora.xtec.cat\/iesllagostera\/wp-content\/uploads\/usu1990\/2026\/01\/2BDC6E14-AD87-4922-9F2C-7AFDAD93F0DD.jpg 945w, https:\/\/agora.xtec.cat\/iesllagostera\/wp-content\/uploads\/usu1990\/2026\/01\/2BDC6E14-AD87-4922-9F2C-7AFDAD93F0DD-300x300.jpg 300w, https:\/\/agora.xtec.cat\/iesllagostera\/wp-content\/uploads\/usu1990\/2026\/01\/2BDC6E14-AD87-4922-9F2C-7AFDAD93F0DD-150x150.jpg 150w, https:\/\/agora.xtec.cat\/iesllagostera\/wp-content\/uploads\/usu1990\/2026\/01\/2BDC6E14-AD87-4922-9F2C-7AFDAD93F0DD-768x768.jpg 768w\" sizes=\"auto, (max-width: 329px) 100vw, 329px\" \/><\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Els dies de pluja ens dificulten poder sortir a l&#8217;aire lliure, a gaudir de la natura, a treballar en el nostre hort o b\u00e9 a fer el manteniment dels jardins de l&#8217;institut. Per\u00f2 tamb\u00e9 ens han estat \u00fatils per fer pr\u00e0ctiques al laboratori de Biologia.&hellip;  <a href=\"https:\/\/agora.xtec.cat\/iesllagostera\/general\/acids-i-bases-cromatografia-optativa-de-jardineria-3r-deso\/\" title=\"Read \u00c0cids i bases &#8211; Cromatografia &#8211; Optativa de jardineria 3r d&#8217;ESO\">Llegeix m\u00e9s\u00bb<\/a><\/p>\n","protected":false},"author":1,"featured_media":9031,"comment_status":"closed","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":[6,3,1,29],"tags":[339],"class_list":["post-9030","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-eso-3","category-eso","category-general","category-portada","tag-optativa-jardineria"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/agora.xtec.cat\/iesllagostera\/wp-json\/wp\/v2\/posts\/9030","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agora.xtec.cat\/iesllagostera\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agora.xtec.cat\/iesllagostera\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/iesllagostera\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/iesllagostera\/wp-json\/wp\/v2\/comments?post=9030"}],"version-history":[{"count":6,"href":"https:\/\/agora.xtec.cat\/iesllagostera\/wp-json\/wp\/v2\/posts\/9030\/revisions"}],"predecessor-version":[{"id":9040,"href":"https:\/\/agora.xtec.cat\/iesllagostera\/wp-json\/wp\/v2\/posts\/9030\/revisions\/9040"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/iesllagostera\/wp-json\/wp\/v2\/media\/9031"}],"wp:attachment":[{"href":"https:\/\/agora.xtec.cat\/iesllagostera\/wp-json\/wp\/v2\/media?parent=9030"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agora.xtec.cat\/iesllagostera\/wp-json\/wp\/v2\/categories?post=9030"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agora.xtec.cat\/iesllagostera\/wp-json\/wp\/v2\/tags?post=9030"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}