Допишите уравнения химических реакций.
а) $... + K_{2}O → KOH$
б) $Ca(OH)_{2}$ $\overset{t}{→}$ ...
в) $CaO + ... → Ca(OH)_{2}$
г) $... + O_{2} → Fe_{2}O_{3}$
$H_{2}O + K_{2}O → 2KOH$
$Ca(OH)_{2}$ $\overset{t}{→}$ $CaO + H_{2}O$
$CaO + H_{2}O → Ca(OH)_{2}$
$4FeO + O_{2} → 2Fe_{2}O_{3}$
