Реакции получения => koh => lioh => ca(oh)2 => zn(oh)2 => fe(oh)2

2K+2H2O=2KOH+H2
2Li+H2O=2LiOH+H2
CaO+H2O=Ca(OH)2
Zn(NO3)2+2NaOH=2NaNO3+Zn(OH)2
FeCl2+2KOH=Fe(OH)2+2KCl

2K+2H2O -> 2KOH+H2
2Li+H2O -> 2LiOH+H2
CaO+H2O -> Ca(OH)2
Zn(NO3)2+2NaOH -> 2NaNO3+Zn(OH)2
FeCl2+2KOH -> Fe(OH)2+2KCl