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La teobromina (C7H8N4O2) de una muestra de cacao molido de 2,95 g se convirtió en la sal de plata poco soluble C7H7N4O2Ag calentando la muestra en una disolución amoniacal que contenÃa 25 mL de AgNO3 0,0100 M. Tras completar la reacción se eliminaron los residuos sólidos por filtración. A) Calcule el porcentaje en masa de teobromina (Masa molecular = 180,1 g/mol) en la muestra si la disolución obtenida tras la filtración junto con los lÃquidos de lavado se combinaron y requirieron 7,69 mL de KSCN 0,0108 M hasta alcanzar el punto final de la valoración. B) Indique asimismo qué indicador podrÃa utilizar para detectar el punto final de esta valoración.
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La teobromina (C7H8N4O2) de una muestra de cacao molido de 2,95 g se convirtió en la sal de plata po...
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