1 вариант
1)
S+H2-->H2S
2H2S+3O2-->2H2O+2SO2
SO2+Na2O-->Na2SO3
2) C+2H2SO4(k)-->2SO2+CO2+2H2O
3)
Cu(OH)2+H2SO4-->CuSO4+2H2O
Cu+2H2SO4-->CuSO4+SO2+2H2O
ZnO+H2SO4-->ZnSO4+H2O
Ba(NO3)2+H2SO4-->BaSO4+2HNO3
Fe+H2SO4-->FeSO4+H2
CO2+H2SO4≠
2 вариант
S+O2-->SO2
S+Al-->Al2S3
2SO2+O2-->2SO3
2)
H2S+2FeCL3-->2FeCL2+2HCL+S
2NaOH+H2SO4-->Na2SO3+2H2O
2Ag+2H2SO4(k)-->Ag2SO4+SO2+2H2O
MgO+H2SO4-->MgSO4+H2O
SO2+H2SO4≠
BaCL2+H2SO4-->BaSO4+2HCL
Ca+H2SO4-->CaSO4+H2
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Answers & Comments
1 вариант
1)
S+H2-->H2S
2H2S+3O2-->2H2O+2SO2
SO2+Na2O-->Na2SO3
2) C+2H2SO4(k)-->2SO2+CO2+2H2O
3)
Cu(OH)2+H2SO4-->CuSO4+2H2O
Cu+2H2SO4-->CuSO4+SO2+2H2O
ZnO+H2SO4-->ZnSO4+H2O
Ba(NO3)2+H2SO4-->BaSO4+2HNO3
Fe+H2SO4-->FeSO4+H2
CO2+H2SO4≠
2 вариант
1)
S+H2-->H2S
S+O2-->SO2
S+Al-->Al2S3
2SO2+O2-->2SO3
2)
H2S+2FeCL3-->2FeCL2+2HCL+S
3)
2NaOH+H2SO4-->Na2SO3+2H2O
2Ag+2H2SO4(k)-->Ag2SO4+SO2+2H2O
MgO+H2SO4-->MgSO4+H2O
SO2+H2SO4≠
BaCL2+H2SO4-->BaSO4+2HCL
Ca+H2SO4-->CaSO4+H2