1)
H2O +SO3 = H2SO4
Ca +2H2O = Ca(OH)2 +H2
Na2O + H2O = 2 NaOH
2)
Fe +H2SO4 = FeSO4 +H2
FeSO4 +2KOH = Fe(OH)2 +K2SO4
Fe(OH)2 = FeO +H2O
3)
CO2 +H2O = H2CO3
CO2 +Na2O = Na2CO3
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Answers & Comments
Verified answer
1)
H2O +SO3 = H2SO4
Ca +2H2O = Ca(OH)2 +H2
Na2O + H2O = 2 NaOH
2)
Fe +H2SO4 = FeSO4 +H2
FeSO4 +2KOH = Fe(OH)2 +K2SO4
Fe(OH)2 = FeO +H2O
3)
CO2 +H2O = H2CO3
CO2 +Na2O = Na2CO3