Help 1. Fe2O3-> Fe->Fecl2->Fe(OH)2->Feo 2.Ca ->CaO->Ca(OH)2->CaCl2->CaCO3Вообщем нужно...

Решите задачу:

$1) Fe_{2} O_{3} +3H_{2} = 2Fe+3H_{2}O$
$2) Fe+2HCl = FeCl_{2} +H_{2}$
$3) FeCl_{2} +2KOH = Fe(OH)_{2}(осадок) +2KCl$
$Fe^{2+} +2Cl^{-} +2K^{+} +2OH^{-} = Fe(OH)_{2} + 2K^{+}+2Cl^{-}$
$Fe^{2+}+2OH^{-} = Fe(OH)_{2}$
$4) Fe(OH)_{2} = FeO+H_{2} O$

$1) 2Ca+O_{2} =2CaO$
$2) CaO+H_{2} O= Ca(OH)_{2}$
$3) Ca(OH)_{2}+2HCl= CaCl_{2} +H_{2}O$
$4) CaCl_{2}+H_{2}CO_{3} = CaCO_{3}+2HCl$