Answer
a) $Na_2O+H_2O\rightarrow 2NaOH$ - sodium hydroxide
b) $CaO+H_2O\rightarrow Ca(OH)_2$ - calcium hydroxide
c) $Li_2O+H_2O\rightarrow 2LiOH$ - lithium hydroxide
d) $MgO+SO_2\rightarrow MgSO_3$ - magnesium sulfite
e) $CaO+CO_2\rightarrow CaCO_3$ - calcium carbonate
Work Step by Step
a) $Na_2O+H_2O\rightarrow 2NaOH$ - sodium hydroxide
b) $CaO+H_2O\rightarrow Ca(OH)_2$ - calcium hydroxide
c) $Li_2O+H_2O\rightarrow 2LiOH$ - lithium hydroxide
d) $MgO+SO_2\rightarrow MgSO_3$ - magnesium sulfite
e) $CaO+CO_2\rightarrow CaCO_3$ - calcium carbonate