Предмет: Химия, автор: muborakshoev81

Определить массу раствора азотной кислоты с массовой долей 5%, необходимого для получения кальция нитрата из кальций оксида массой 11,2 г

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Автор ответа: GarySanderson

n(CaO)=11.2/56=0.2 моль
Mr(CaO)=56
CaO+2HNO3=Ca(NO3)2+H2O
1 моль---2 моль
n(HNO3)=0.2*2=0.4 моль
m(HNO3)=63*0.4=25.2 г
Mr(HNO3)=63
m(HNO3р-ра)=25.2*100%/5=504 г

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