1. Са+Н2S=CaS + H2
2.ВаО+Н2SO4=ВаSO4+Н2О
Na2O+Н2SO4=Na2SO4+Н2O
Na2SO3+Н2SO4=Na2SO4+SO2+Н2O
Zn+Н2SO4=ZnSO4+Н2
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Answers & Comments
1. Са+Н2S=CaS + H2
2.ВаО+Н2SO4=ВаSO4+Н2О
Na2O+Н2SO4=Na2SO4+Н2O
Na2SO3+Н2SO4=Na2SO4+SO2+Н2O
Zn+Н2SO4=ZnSO4+Н2