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{“questions”:{“a9v6f”:{“id”:”a9v6f”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\np.san 2012\r\n\r\n \r\nL\u2019acido carbonico \u00e8 un acido debole e insieme allo ione bicarbonato costituisce un sistema tampone presente nel sangue umano. Cosa accade se il pH del sangue scende …

{“questions”:{“8i1xt”:{“id”:”8i1xt”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\np.san 2009\r\n\r\n \r\nLe soluzioni tampone servono a:\r\n“,”desc”:””,”hint”:””,”answers”:{“eh54h”:{“id”:”eh54h”,”image”:””,”imageId”:””,”title”:”A) modificare il pH di una soluzione”},”xpidq”:{“id”:”xpidq”,”image”:””,”imageId”:””,”title”:”B) acidificare una soluzione”},”tn48p”:{“id”:”tn48p”,”image”:””,”imageId”:””,”title”:”C) mantenere la neutralit\u00e0 di una soluzione”},”oh7xr”:{“id”:”oh7xr”,”image”:””,”imageId”:””,”title”:”D) limitare le variazioni di pH di una …

{“questions”:{“joeri”:{“id”:”joeri”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\np.san 2005\r\n\r\n \r\nChe cos\u2019\u00e8 una soluzione tampone?\r\n“,”desc”:””,”hint”:””,”answers”:{“n2b7x”:{“id”:”n2b7x”,”image”:””,”imageId”:””,”title”:”A) una soluzione che assorbe acqua”},”gk05w”:{“id”:”gk05w”,”image”:””,”imageId”:””,”title”:”B) una soluzione che mantiene inalterato il valore del pH per piccole aggiunte di acido o base”,”isCorrect”:”1″},”fnoay”:{“id”:”fnoay”,”image”:””,”imageId”:””,”title”:”C) una …

{“questions”:{“1o4qg”:{“id”:”1o4qg”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\nMedicina 2014\r\n\r\n \r\nQuale\/i delle seguenti affermazioni relative a una soluzione tampone acida \u00e8\/sono corretta\/e?\r\n 1. Il pH non varia qualunque sia la quantit\u00e0 di acido o base aggiunti alla …

{“questions”:{“b6xyc”:{“id”:”b6xyc”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\nVeterinaria 2007\r\n\r\n \r\nSe una soluzione tampone (1 litro) a pH = 4 viene diluita con acqua (a 10 litri), il pH della soluzione ottenuta \u00e8 circa:\r\n“,”desc”:””,”hint”:””,”answers”:{“y6nh9”:{“id”:”y6nh9″,”image”:””,”imageId”:””,”title”:”A) 4″,”isCorrect”:”1″},”yeswv”:{“id”:”yeswv”,”image”:””,”imageId”:””,”title”:”B) 9″},”6y302″:{“id”:”6y302″,”image”:””,”imageId”:””,”title”:”C) 8″},”4p567″:{“id”:”4p567″,”image”:””,”imageId”:””,”title”:”D) …

{“questions”:{“qxfmf”:{“id”:”qxfmf”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\nMedicina 1998\r\n\r\n \r\nUna soluzione tampone e’ caratterizzata da:\r\n“,”desc”:””,”hint”:””,”answers”:{“7p3j1”:{“id”:”7p3j1″,”image”:””,”imageId”:””,”title”:”A) una pressione osmotica nota e costante “},”u2kxr”:{“id”:”u2kxr”,”image”:””,”imageId”:””,”title”:”B) la capacit\u00e0 di mantenere costante, entro certi limiti, il pH”,”isCorrect”:”1″},”2era1″:{“id”:”2era1″,”image”:””,”imageId”:””,”title”:”C) una pressione osmotica identica …

{“questions”:{“pp11x”:{“id”:”pp11x”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\np.san 2010\r\n\r\n \r\nMescolando volumi uguali di soluzioni acquose equimolari di ammoniaca (NH3) e acido cloridrico (HCl) si ottiene, a 25 \u00b0C, una soluzione:\r\n“,”desc”:””,”hint”:””,”answers”:{“w8heg”:{“id”:”w8heg”,”image”:””,”imageId”:””,”title”:”A) basica”},”mvhjw”:{“id”:”mvhjw”,”image”:””,”imageId”:””,”title”:”B) acida”,”isCorrect”:”1″},”m7jxa”:{“id”:”m7jxa”,”image”:””,”imageId”:””,”title”:”C) poco basica”},”w8g6h”:{“id”:”w8g6h”,”image”:””,”imageId”:””,”title”:”D) neutra”},”fin9a”:{“id”:”fin9a”,”image”:””,”imageId”:””,”title”:”E) molto …

{“questions”:{“e0u59”:{“id”:”e0u59″,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\np.san 2004 \r\n\r\n \r\nIl cloruro di ammonio in acqua d\u00e0:\r\n“,”desc”:””,”hint”:””,”answers”:{“ho7tf”:{“id”:”ho7tf”,”image”:””,”imageId”:””,”title”:”A) un sistema tampone”},”ix32h”:{“id”:”ix32h”,”image”:””,”imageId”:””,”title”:”B) un’idrolisi neutra”},”cd292″:{“id”:”cd292″,”image”:””,”imageId”:””,”title”:”C) un’idrlolisi basica”},”70zi3″:{“id”:”70zi3″,”image”:””,”imageId”:””,”title”:”D) una reazione di neutralizzazione”},”lwcs4″:{“id”:”lwcs4″,”image”:””,”imageId”:””,”title”:”E) un’idrolisi acida”,”isCorrect”:”1″}}}},”results”:{“zt6r9”:{“id”:”zt6r9″,”title”:””,”image”:””,”imageId”:””,”min”:”0″,”max”:”1″,”desc”:” Il cloruro di ammonio \u00e8 un …

{“questions”:{“5wyeo”:{“id”:”5wyeo”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\nMedicina 2007\r\n\r\n \r\nSono elettroliti forti in acqua:\r\n“,”desc”:””,”hint”:””,”answers”:{“skv0t”:{“id”:”skv0t”,”image”:””,”imageId”:””,”title”:”A) tutte le anidridi”},”afvgo”:{“id”:”afvgo”,”image”:””,”imageId”:””,”title”:”B) tutti gli acidi”},”gcssi”:{“id”:”gcssi”,”image”:””,”imageId”:””,”title”:”C) tutti gli idrossidi”},”95ffg”:{“id”:”95ffg”,”image”:””,”imageId”:””,”title”:”D) tutti i sali solubili”,”isCorrect”:”1″},”lnpmb”:{“id”:”lnpmb”,”image”:””,”imageId”:””,”title”:”E) tutte le basi”}}}},”results”:{“ehm42”:{“id”:”ehm42″,”title”:””,”image”:””,”imageId”:””,”min”:”0″,”max”:”1″,”desc”:” Tutte le sostanze che sciogliendosi in …

{“questions”:{“gqx6e”:{“id”:”gqx6e”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\nVeterinaria 2006 \r\n\r\n \r\nIl bicarbonato di sodio NaHCO3 in soluzione si comporta come:\r\n“,”desc”:””,”hint”:””,”answers”:{“mey3v”:{“id”:”mey3v”,”image”:””,”imageId”:””,”title”:”A) un sale assolutamente neutro”},”voc8d”:{“id”:”voc8d”,”image”:””,”imageId”:””,”title”:”B) un acido debole”},”q37ev”:{“id”:”q37ev”,”image”:””,”imageId”:””,”title”:”C) una base forte”},”k6cq4″:{“id”:”k6cq4″,”image”:””,”imageId”:””,”title”:”D) un acido forte”},”gl5dj”:{“id”:”gl5dj”,”image”:””,”imageId”:””,”title”:”E) una base debole”,”isCorrect”:”1″}}}},”results”:{“10gdt”:{“id”:”10gdt”,”title”:””,”image”:””,”imageId”:””,”min”:”0″,”max”:”1″,”desc”:” …