2NaOH + CO2 ==== Na2CO3 + H2O

2NaOH + SO2 ==== Na2SO3 + H2O

2NaOH + SO3 ==== Na2SO4 + H2O

HNO3 + NaOH ==== NaNO3 + H2O

CH3COOH + NaOH ==== CH3COONa + H2O

AlCl3 + 3NaOH ==== Al(OH)3↓+3NaCl

鹽酸和燒鹼起反應：HCl + NaOH ==== NaCl +H2O

硫酸和燒鹼反應：H2SO4 + 2NaOH ==== Na2SO4 + 2H2O

2NaOH + CuSO4 ==== Cu(OH)2↓ + Na2SO4

氫氧化鈉與氯化鐵：3NaOH + FeCl3 ==== Fe(OH)3↓ + 3NaCl

氫氧化鈉與氯化鎂：2NaOH + MgCl2 ==== Mg(OH)2↓ + 2NaCl

氫氧化鈉與氯化銅：2NaOH + CuCl2 ==== Cu(OH)2↓ + 2NaCl

Si+2NaOH+H2O===Na2SiO3+2H2

3S+6NaOH===2Na2S+Na2SO3+3H2O

Al2O3+2NaOH===2NaAlO2+H2O

低價態的還原性：

2NaOH+SO2（少量）===Na2SO3+H2O

NaOH+SO2（足量）===NaHSO3

與酸性物質的作用：

2NaOH+SiO2===NaSiO3+H2O

2NaOH+Al2O3===2NaAlO2+H2O

2NaOH+Cl2===NaCl+NaClO+H2O

NaOH+HCl===NaCl+H2O

NaOH+H2S（足量）===NaHS+H2O

2NaOH+H2S（少量）===Na2S+2H2O

NaOH+Al（OH）3===NaAlO2+2H2O

NaOH+NH4Cl===NaCl+NH3+H2O