$Fe$ + $2H_{2}O$ + $O_{2}$→$2Fe(OH)_{2}$
$Fe(OH)_{2}$ + $2HCl$→$FeCl_{2}$ + $2H_{2}O$
$FeCl_{2}$ + $2NaNO_{3}$→$Fe(NO_{3})_{2}$ + $2NaCl$
$2NaCl$ + $2H_{2}O$→$Cl_{2}$ + $H_{2}$ + $2NaOH$
$2NaOH$ + $Fe(NO_{3}){2}$ →$Fe(OH)_{2}$ + $2NaNO_{3}$
Xin câu trả lời hay nhất ạ!