Вопрос школьника по предмету Окружающий мир
Взаимодействие карбоната натрия с раствором хлорида кальция относят к реакциям
Ответ учителя по предмету Окружающий мир
CaCl2+Na2CO3=CaCO3+2NaCl
n(CaCO3)= m/M=8/100=0,08 моль
по ур. реакции n(CaCl2)=n(CaCO3)
m(CaCl2)=n*M=0,08*111=8,88 г
m p-pa(CaCl2)=8,88/0,12=74 г
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