NaOH + H2SO4 -> Na2SO4 + H2OCuCl2 + NaOH -> CuOHOHOH2 + NaClFe2SO4SO4SO43 + NaOH -> FeOHOHOH3 + Na2SO4CO2 + 2NaOH -> Na2CO3 + H2O
NaOH + H2SO4 -> Na2SO4 + H2O
CuCl2 + NaOH -> CuOHOHOH2 + NaCl
Fe2SO4SO4SO43 + NaOH -> FeOHOHOH3 + Na2SO4
CO2 + 2NaOH -> Na2CO3 + H2O