Question

O+h²o= caoh= al²o³+na²o= h²so⁴= cao+h²co³= co²+mgoh=

Answer 1

1. 2$H_{2} O$ + $O_{2}$ ⇒ $H_{2} O_{2}$;
2. $Ca(OH)_{2}$ ⇒ $H_{2} O$ + $CaO$;
3. $Al_{2} O_{3}$ + $Na_{2} O$ ⇒ 2$NaAlO_{2}$;
4. $H_{2} SO_{4}$ ⇒ $H_{2} O$ + $SO_{3}$; 
5. $CaO$ + $H_{2} CO_{3}$ ⇒ $H_{2}O$ + $CaCO_{3}$↓;
6. $CO_{2}$ + $Mg(OH)_{2}$↓ ⇒ $H_{2}O$ + $MgCO_{3}$↓.