$2Na + 2{H_2}O \to 2NaOH + {H_2}$
$N{a_2}O + {H_2}O \to 2NaOH$
$2NaCl + 2{H_2}O\xrightarrow[{cmn}]{{dpdd}}2NaOH + {H_2} + C{l_2}$
$N{a_2}C{O_3} + Ca{(OH)_2} \to 2NaOH + CaC{O_3} \downarrow $
$N{a_2}S{O_4} + Ba{(OH)_2} \to 2NaOH + BaS{O_4} \downarrow $
$N{a_2}{O_2} + {H_2}O \to 2NaOH + {O_2}$