{"id":153,"date":"2022-06-23T15:49:52","date_gmt":"2022-06-23T15:49:52","guid":{"rendered":"https:\/\/futura.study\/blog\/?p=153"},"modified":"2022-06-23T15:49:52","modified_gmt":"2022-06-23T15:49:52","slug":"soluzioni-tampone","status":"publish","type":"post","link":"https:\/\/futura.study\/blog\/materie\/argomenti-chimica-test-medicina-e-tolc\/soluzioni-tampone\/","title":{"rendered":"SOLUZIONI TAMPONE"},"content":{"rendered":"<p><b>Soluzioni tampone: tutto quello che c&#8217;\u00e8 da sapere per il test di medicina<\/b><\/p>\n<p>&nbsp;<\/p>\n<p><b>Che cosa sono?<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Si tratta di particolari soluzioni in cui l\u2019aggiunta di un acido o di una base riesce a influenzare il pH solo parzialmente, che si mantiene quasi costante.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">All\u2019interno del nostro corpo ne esistono numerose e hanno il compito di impedire danni a processi biochimici fondamentali.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Per esempio: nel plasma il principale sistema tampone \u00e8 quello costituito da acido carbonico e bicarbonato di sodio.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><b>Possono essere costituite da:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\" aria-checked=\"false\"><span style=\"font-weight: 400;\">una soluzione contenente un acido debole e il suo sale con una base forte\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\" aria-checked=\"false\"><span style=\"font-weight: 400;\">una soluzione contenente una base debole e il suo sale con un acido forte<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Ad esempio: <\/span><span style=\"font-weight: 400;\">acido acetico <\/span><span style=\"font-weight: 400;\">CH<\/span><span style=\"font-weight: 400;\">3<\/span><span style=\"font-weight: 400;\">COOH (<\/span><span style=\"font-weight: 400;\">acido debole) e acetato di sodio <\/span><span style=\"font-weight: 400;\">CH<\/span><span style=\"font-weight: 400;\">3<\/span><span style=\"font-weight: 400;\">COONa<\/span><span style=\"font-weight: 400;\"> (sale dell\u2019acido).<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><b>Cosa succede se&#8230;<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\" aria-checked=\"false\"><span style=\"font-weight: 400;\">aggiungo un acido forte, aumenta la concentrazione di H3O+ e la reazione si sposta verso sinistra, verso la produzione di reagente<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\" aria-checked=\"false\"><span style=\"font-weight: 400;\">aggiungo una base forte, gli OH\u2013\u00a0 liberati dalla base neutralizzano gli ioni H3O+ e la reazione\u00a0 procede verso destra fino a quando non si ristabilisce l\u2019equilibrio<\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><b>Formule che potrebbero servirti al test per&#8230;<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\" aria-checked=\"false\"><span style=\"font-weight: 400;\">calcolare la concentrazione di H+:\u00a0\u00a0<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 [H+] = Ka * Ca\/Cs<\/span><\/p>\n<p><span style=\"font-weight: 400;\">dove Ca indica la concentrazione dell\u2019acido, Cs quella del sale e Ka la costante di dissociazione<\/span><\/p>\n<p><span style=\"font-weight: 400;\">oppure<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0[H+] = K<\/span><span style=\"font-weight: 400;\">a<\/span><span style=\"font-weight: 400;\"> * N<\/span><span style=\"font-weight: 400;\">a<\/span><span style=\"font-weight: 400;\">\/N<\/span><span style=\"font-weight: 400;\">s<\/span><\/p>\n<p><span style=\"font-weight: 400;\">dove N<\/span><span style=\"font-weight: 400;\">a<\/span><span style=\"font-weight: 400;\"> indica le moli di acido e N<\/span><span style=\"font-weight: 400;\">s<\/span><span style=\"font-weight: 400;\"> le moli di sale<\/span><\/p>\n<p>&nbsp;<\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\" aria-checked=\"false\"><span style=\"font-weight: 400;\">calcolare il pH complessivo della soluzione:\u00a0<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">pH = pKa + log10 [sale]\/[acido]<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Soluzioni tampone: tutto quello che c&#8217;\u00e8 da sapere per il test di medicina &nbsp; Che cosa sono? Si tratta di particolari soluzioni in cui l\u2019aggiunta di un acido o di&#8230;<\/p>\n","protected":false},"author":1,"featured_media":154,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"content-type":"","footnotes":""},"categories":[9],"tags":[12,13,10],"class_list":{"0":"post-153","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-argomenti-chimica-test-medicina-e-tolc","8":"tag-acidi","9":"tag-basi","10":"tag-chimica"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>SOLUZIONI TAMPONE - Futura Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/futura.study\/blog\/materie\/argomenti-chimica-test-medicina-e-tolc\/soluzioni-tampone\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SOLUZIONI TAMPONE - Futura Blog\" \/>\n<meta property=\"og:description\" content=\"Soluzioni tampone: tutto quello che c&#8217;\u00e8 da sapere per il test di medicina &nbsp; Che cosa sono? 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