Zn(OH)2+2HNO3=Zn(NO3)2+2H2O
Дано:
m(NaOH)=80г
n(Na2SO4)-?
Решение:
Naoh+h2so4=na2so4+h2o
n(Naoh)=m\M=80\40=2моль
n(Naoh)=n(na2so4)=2 моль
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