Archives

{“questions”:{“50z0r”:{“id”:”50z0r”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\nOdontoiatria 2008\r\n\r\n \r\nIn relazione alla definizione di acido e di base secondo la teoria di Br\u00f8nsted e Lowry, indica l\u2019unica affermazione sbagliata:\r\n“,”desc”:””,”hint”:””,”answers”:{“osx53”:{“id”:”osx53″,”image”:””,”imageId”:””,”title”:”A) si definiscono acidi tutte le specie chimiche …

{“questions”:{“a3igs”:{“id”:”a3igs”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\np.san 2017\r\n\r\n \r\nVariando il valore di pH di una soluzione da 4 a 6 la concentrazione degli ioni idrogeno in soluzione:\r\n“,”desc”:””,”hint”:””,”answers”:{“l50oa”:{“id”:”l50oa”,”image”:””,”imageId”:””,”title”:”A) si dimezza”},”q1rwu”:{“id”:”q1rwu”,”image”:””,”imageId”:””,”title”:”B) aumenta di 100 volte”},”3xxqi”:{“id”:”3xxqi”,”image”:””,”imageId”:””,”title”:”C) diminuisce di …

{“questions”:{“dxpta”:{“id”:”dxpta”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\np.san 2013\r\n\r\n \r\nUna soluzione con pH = 9 \u00e8 da considerarsi:\r\n“,”desc”:””,”hint”:””,”answers”:{“ii7fj”:{“id”:”ii7fj”,”image”:””,”imageId”:””,”title”:”A) neutra “},”jy9kl”:{“id”:”jy9kl”,”image”:””,”imageId”:””,”title”:”B) debolmente acida”},”ex3rp”:{“id”:”ex3rp”,”image”:””,”imageId”:””,”title”:”C) acida”},”fx67g”:{“id”:”fx67g”,”image”:””,”imageId”:””,”title”:”D) basica”,”isCorrect”:”1″},”vyrhc”:{“id”:”vyrhc”,”image”:””,”imageId”:””,”title”:”E) isotonica”}}}},”results”:{“bfirz”:{“id”:”bfirz”,”title”:””,”image”:””,”imageId”:””,”min”:”0″,”max”:”1″,”desc”:” Un sistema di misura della acidit\u00e0 \u00e8 il \u00abpH\u00bb che utilizza …

{“questions”:{“9gkgc”:{“id”:”9gkgc”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\np.san 2011\r\n\r\n \r\nSe in una soluzione acquosa la concentrazione degli ioni ossidrile \u00e8 10\u20133 moli\/litro, la concentrazione degli ioni idrogeno deve essere:\r\n“,”desc”:””,”hint”:””,”answers”:{“zvwlv”:{“id”:”zvwlv”,”image”:””,”imageId”:””,”title”:”A) 10\u20133 moli\/litro”},”rxany”:{“id”:”rxany”,”image”:””,”imageId”:””,”title”:”B) 10\u20135 moli\/litro”},”wotku”:{“id”:”wotku”,”image”:””,”imageId”:””,”title”:”C) 10\u201311 moli\/litro”,”isCorrect”:”1″},”leioh”:{“id”:”leioh”,”image”:””,”imageId”:””,”title”:”D) 10\u20134 …

{“questions”:{“m54p7”:{“id”:”m54p7″,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\np.san 2007\r\n\r\n \r\nUna soluzione che ha pH = 3 \u00e8 da considerarsi:\r\n“,”desc”:””,”hint”:””,”answers”:{“onc2q”:{“id”:”onc2q”,”image”:””,”imageId”:””,”title”:”A) debolmente acida”},”sjlvy”:{“id”:”sjlvy”,”image”:””,”imageId”:””,”title”:”B) acida”,”isCorrect”:”1″},”skfhs”:{“id”:”skfhs”,”image”:””,”imageId”:””,”title”:”C) neutra”},”unwa1″:{“id”:”unwa1″,”image”:””,”imageId”:””,”title”:”D) basica”},”zvglh”:{“id”:”zvglh”,”image”:””,”imageId”:””,”title”:”E) debolmente basica”}}}},”results”:{“7rhsd”:{“id”:”7rhsd”,”title”:””,”image”:””,”imageId”:””,”min”:”0″,”max”:”1″,”desc”:” Un sistema di misura della acidit\u00e0 \u00e8 il \u00abpH\u00bb che …

{“questions”:{“5rdyi”:{“id”:”5rdyi”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\np.san 2006\r\n\r\n \r\nUna soluzione acida \u00e8 caratterizzata:\r\n“,”desc”:””,”hint”:””,”answers”:{“zy0pc”:{“id”:”zy0pc”,”image”:””,”imageId”:””,”title”:”A) da una concentrazione di ioni idrogeno inferiore a quella di ioni ossidrile”},”qtrsy”:{“id”:”qtrsy”,”image”:””,”imageId”:””,”title”:”B) da idrogeno disciolto a una concentrazione uguale a quella dell’ossigeno”},”eak5k”:{“id”:”eak5k”,”image”:””,”imageId”:””,”title”:”C) …

{“questions”:{“xu55c”:{“id”:”xu55c”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\np.san 2003p.san 2005\r\n\r\n \r\nIl pH \u00e8:\r\n“,”desc”:””,”hint”:””,”answers”:{“szh4a”:{“id”:”szh4a”,”image”:””,”imageId”:””,”title”:”A) il logaritmo della concentrazione idrogenionica”},”g04ft”:{“id”:”g04ft”,”image”:””,”imageId”:””,”title”:”B) il logaritmo negativo della concentrazione idrogenionica”,”isCorrect”:”1″},”g80mc”:{“id”:”g80mc”,”image”:””,”imageId”:””,”title”:”C) la concentrazione idrogenionica”},”qdeq0″:{“id”:”qdeq0″,”image”:””,”imageId”:””,”title”:”D) la concentrazione ossidrilionica”},”13y2n”:{“id”:”13y2n”,”image”:””,”imageId”:””,”title”:”E) la carica elettrica”}}}},”results”:{“ubmus”:{“id”:”ubmus”,”title”:””,”image”:””,”imageId”:””,”min”:”0″,”max”:”1″,”desc”:” Un sistema di …

{“questions”:{“lhloe”:{“id”:”lhloe”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\nVeterinaria 2015 \r\n\r\n \r\nQuale delle seguenti espressioni matematiche mostra come calcolare il pH di una soluzione acquosa di acido solforico 0,002 M?\r\n“,”desc”:””,”hint”:””,”answers”:{“8c1wu”:{“id”:”8c1wu”,”image”:””,”imageId”:””,”title”:”A) pH = log10 0,002″},”gee3q”:{“id”:”gee3q”,”image”:””,”imageId”:””,”title”:”B) pH = log10 …

{“questions”:{“184id”:{“id”:”184id”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\nVeterinaria 2014\r\n\r\n \r\nIn una soluzione, la concentrazione di ioni H3O+ \u00e8 1,0\u00d710\u22128 mol\u00b7dm\u22123.\r\nQual \u00e8 la concentrazione di ioni OH\u2212 nella soluzione espressa in mol\u00b7dm\u22123?\r\n“,”desc”:””,”hint”:””,”answers”:{“tfs4y”:{“id”:”tfs4y”,”image”:””,”imageId”:””,”title”:”A) 1,0\u00d710\u20134“},”fsnsr”:{“id”:”fsnsr”,”image”:””,”imageId”:””,”title”:”B) 1,0\u00d710\u20132“},”45tam”:{“id”:”45tam”,”image”:””,”imageId”:””,”title”:”C) 1,0\u00d710\u20136“,”isCorrect”:”1″},”x88b7″:{“id”:”x88b7″,”image”:””,”imageId”:””,”title”:”D) 1,0\u00d710\u20138“},”e32jv”:{“id”:”e32jv”,”image”:””,”imageId”:””,”title”:”E) 1,0\u00d710\u201319“}}}},”results”:{“atlxv”:{“id”:”atlxv”,”title”:””,”image”:””,”imageId”:””,”min”:”0″,”max”:”1″,”desc”:” …

{“questions”:{“nsg31”:{“id”:”nsg31″,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\nOdontoiatria 2009 \r\n\r\n \r\nUna soluzione acquosa a 25\u00b0C in cui la concentrazione di H+ \u00e8 uguale a 10-5 M e la concentrazione di OH– \u00e8 pari a 10-8 M:\r\n“,”desc”:””,”hint”:””,”answers”:{“4qbcs”:{“id”:”4qbcs”,”image”:””,”imageId”:””,”title”:”A) …