{"id":1349,"date":"2020-02-28T13:29:29","date_gmt":"2020-02-28T13:29:29","guid":{"rendered":"http:\/\/institutviladomat.cat\/portfoli\/16laiapi\/?p=1349"},"modified":"2022-03-14T12:52:27","modified_gmt":"2022-03-14T12:52:27","slug":"pluja-dor","status":"publish","type":"post","link":"https:\/\/institutviladomat.cat\/portfoli\/16laiapi\/2020\/02\/28\/pluja-dor\/","title":{"rendered":"Pluja d&#8217;or"},"content":{"rendered":"\n<p>La pr\u00e0ctica de la pluja d&#8217;or consistia a observar la formaci\u00f3 de dos s\u00f2lids diferents amb la mateixa composici\u00f3 a partir d\u2019una reacci\u00f3 de precipitaci\u00f3.<\/p>\n\n\n\n<p>Primerament vam preparar dues dissolucions sobre el matr\u00e0s o el vas de precipitats. La primera va ser una dissoluci\u00f3 en aigua de 20 ml de nitrat de plom amb una concentraci\u00f3 de 10 g\/L. La segona dissoluci\u00f3 va ser de 40 ml de iodur de potassi amb una concentraci\u00f3 de 10 g\/L. En el nostre cas no vam preparar un litre de iodur de potassi sin\u00f3 que vam preparar 500 ml i 250 ml de nitrat de plom. Per preparar el iodur de potassi vam pesar 5 g i per preparar el nitrat de plom vam pesar 2,5 g. Posteriorment vam abocar el KI sobre la dissoluci\u00f3 de Pb(NO<sub>3<\/sub>)<sub>2<\/sub>. Vam observar com es formava un precipitat de color groc. Vam escalfar el vas fins que el precipitat va quedar dissolt (utilitzarem la meitat d\u2019aquesta dissoluci\u00f3 o b\u00e9 la tercera part). Vam deixar refredar la dissoluci\u00f3 i vam observar com es va produir la pluja d\u2019or. Finalment vam abocar-ho sobre una proveta i vam observar el resultat.<\/p>\n\n\n\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" width=\"263\" height=\"349.77671561381055\" src=\"https:\/\/lh4.googleusercontent.com\/FoM8qX539-MN9m6Jy8b_-uX6YwzEFS7nld_fzgSet794z929KzoPgo3r0OLwEYhwwkWV0wQvlyl0eBhB9DNMtIz6DnwK-n1In0JtLjhyE86O0M9vOEs0WS-VZmu-TO6oD1Dmyboa\"><\/p>\n\n\n\n<p>He apr\u00e8s com \u00e9s possible que en reaccionar dos components incolors generin un producte de qualsevol color, qu\u00e8 \u00e9s una reacci\u00f3 reversible i que la temperatura afecta que la solubilitat augmenti o disminueixi. Tamb\u00e9 que hem observat un proc\u00e9s de precipitaci\u00f3 i cristal\u00b7litzaci\u00f3.<\/p>\n\n\n\n<p class=\"wp-block-gdm-google-drive-embedder-viewer\"><iframe width=\"100%\" height=\"400\" frameborder=\"0\" scrolling=\"https:\/\/docs.google.com\/document\/d\/1sCa-oozFy1riLqYqyTtb-y93NtMa_PmjcqljZL2OJLw\/preview?usp=drivesdk\" src=\"https:\/\/docs.google.com\/document\/d\/1sCa-oozFy1riLqYqyTtb-y93NtMa_PmjcqljZL2OJLw\/preview?usp=drivesdk\"><\/iframe><\/p>\n","protected":false},"excerpt":{"rendered":"<p>La pr\u00e0ctica de la pluja d&#8217;or consistia a observar la formaci\u00f3 de dos s\u00f2lids diferents amb la mateixa composici\u00f3 a partir d\u2019una reacci\u00f3 de precipitaci\u00f3. Primerament vam preparar&#8230;<\/p>\n","protected":false},"author":118,"featured_media":1357,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,133,1,80,13,58,59,60,61,62,63,64,65,66,134,142,143,234,236,237,239,238,240,235],"tags":[],"_links":{"self":[{"href":"https:\/\/institutviladomat.cat\/portfoli\/16laiapi\/wp-json\/wp\/v2\/posts\/1349"}],"collection":[{"href":"https:\/\/institutviladomat.cat\/portfoli\/16laiapi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/institutviladomat.cat\/portfoli\/16laiapi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/institutviladomat.cat\/portfoli\/16laiapi\/wp-json\/wp\/v2\/users\/118"}],"replies":[{"embeddable":true,"href":"https:\/\/institutviladomat.cat\/portfoli\/16laiapi\/wp-json\/wp\/v2\/comments?post=1349"}],"version-history":[{"count":1,"href":"https:\/\/institutviladomat.cat\/portfoli\/16laiapi\/wp-json\/wp\/v2\/posts\/1349\/revisions"}],"predecessor-version":[{"id":1356,"href":"https:\/\/institutviladomat.cat\/portfoli\/16laiapi\/wp-json\/wp\/v2\/posts\/1349\/revisions\/1356"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/institutviladomat.cat\/portfoli\/16laiapi\/wp-json\/wp\/v2\/media\/1357"}],"wp:attachment":[{"href":"https:\/\/institutviladomat.cat\/portfoli\/16laiapi\/wp-json\/wp\/v2\/media?parent=1349"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/institutviladomat.cat\/portfoli\/16laiapi\/wp-json\/wp\/v2\/categories?post=1349"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/institutviladomat.cat\/portfoli\/16laiapi\/wp-json\/wp\/v2\/tags?post=1349"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}