{"id":1507,"date":"2019-01-21T11:41:02","date_gmt":"2019-01-21T10:41:02","guid":{"rendered":"http:\/\/agora.xtec.cat\/sescollbato\/?p=1507"},"modified":"2019-01-21T13:05:22","modified_gmt":"2019-01-21T12:05:22","slug":"aprenem-a-fer-cristalls-a-primer-deso","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/sescollbato\/eso-1\/eso-1a\/aprenem-a-fer-cristalls-a-primer-deso\/","title":{"rendered":"Aprenem a fer cristalls a 1r ESO"},"content":{"rendered":"<p>La setmana passada ens v\u00e0rem divertir molt a l\u2019optativa de primer d\u2019ESO: \u201c<strong>Apr\u00e8n a Investigar<\/strong>\u201d, fent cristalls a partir de sulfat de coure (CuSO<sub>4<\/sub>)<\/p>\n<p>Aix\u00ed, vam con\u00e8ixer que la <strong>cristal\u00b7litzaci\u00f3<\/strong> \u00e9s un proc\u00e9s de separaci\u00f3 d\u2019un s\u00f2lid a partir d\u2019una dissoluci\u00f3. En incrementar-se la concentraci\u00f3 del s\u00f2lid per sobre del punt de saturaci\u00f3, l\u2019exc\u00e9s de s\u00f2lid es separa en forma de <strong>cristalls<\/strong>.<\/p>\n<p>A l\u2019inici \u00e9rem una mica incr\u00e8duls amb els resultats. Vam preparar una mostra de 100 ml d\u2019aigua destil\u00b7lada i la v\u00e0rem escalfar amb una placa calefactora fins portar-la quasi a l\u2019ebullici\u00f3. Despr\u00e9s v\u00e0rem afegir una mostra de 60 g de CuSO<sub>4<\/sub>\u00a0en pols i ho vam remenar.<\/p>\n<p>Paral\u00b7lelament vam lligar a un petit pal de fusta un fil amb una llavor de CuSO<sub>4<\/sub>\u00a0i la vam \u00a0enfonsar a la dissoluci\u00f3. A mesura que han anat passant els dies s\u2019han format uns cristalls de color <strong>blau<\/strong> ben grans.<\/p>\n<p>I aquests van ser els resultats de la investigaci\u00f3:<\/p>\n<p><a href=\"https:\/\/agora.xtec.cat\/sescollbato\/wp-content\/uploads\/usu225\/2019\/01\/IMG_8992-COLLAGE.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1508\" src=\"https:\/\/agora.xtec.cat\/sescollbato\/wp-content\/uploads\/usu225\/2019\/01\/IMG_8992-COLLAGE.jpg\" alt=\"\" width=\"689\" height=\"918\" srcset=\"https:\/\/agora.xtec.cat\/sescollbato\/wp-content\/uploads\/usu225\/2019\/01\/IMG_8992-COLLAGE.jpg 689w, https:\/\/agora.xtec.cat\/sescollbato\/wp-content\/uploads\/usu225\/2019\/01\/IMG_8992-COLLAGE-225x300.jpg 225w\" sizes=\"auto, (max-width: 689px) 100vw, 689px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Aprenem a investigar amb cristal\u00b7lografia<\/p>\n","protected":false},"author":42,"featured_media":1510,"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,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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