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4 . ( 2 puntos ) Se disuelven 0 . 1 moles de amoniaco ( NH 3 ) en agua hasta tener un volumen de
puntos Se disuelven moles de amoniaco NH en agua hasta tener un volumen de L
a pt Calcule el pH de la disolucin
b ptCuntos gramos de cloruro de amonio NHCl se tienen que aadir a la disolucin anterior para
que el pH sea Considere que el volumen de la disolucin no cambia tras la adicin
c ptAparecer precipitado de MgOH si se aaden moles de MgCl a la disolucin del
apartado aY si se aaden a la disolucin del apartado b
Datos: KbNH
; MNHCl gmol
; KSMgOH
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