Balance the following equation
Al2(SO4)3 +NaOH - Al(OH)3 +Na2SO4
What type of reactions are represented by the following equations
(a) CaO+CO2⟶CaCO3
(b) 2Na+2H2O⟶2NaOH+H2
(c) Mg+CuSO4⟶MgSO4+Cu
(d) NH4NO2⟶N2+2H2O
(e) CuSO4+2NaOH⟶Cu(OH)2+Na2SO4