Question

Ba(OH)2 + SO3 ->
BaO + NaOH ->
Ba(OH)2 + H2CO3 ->
ZnSO4 + NaOH ->
Zn(OH)2 ->
Mg(OH)2 + HNO3 ->

Answer 1

1. Ba(OH)2 + SO3 -> BaSO4 + H2O

2. BaO + NaOH -> BaOH+NaO

3. Ba(OH)2 + H2CO3 -> BaCO3 + 2H2O

4. ZnSO4 + NaOH -> Na(SO4)2+Zn(OH)2

5. Zn(OH)2 -> ZnO + H2O 

6. Mg(OH)2 + HNO3 -> MgNO3+2H2O