NaOH + H2SO4 -> Na2SO4 + H2OCuCl2 + NaOH -> Cu(OH)2 + NaClFe2(SO4)3 + NaOH -> Fe(OH)3 + Na2SO4CO2 + 2NaOH -> Na2CO3 + H2O
NaOH + H2SO4 -> Na2SO4 + H2O
CuCl2 + NaOH -> Cu(OH)2 + NaCl
Fe2(SO4)3 + NaOH -> Fe(OH)3 + Na2SO4
CO2 + 2NaOH -> Na2CO3 + H2O