a)
$2Zn_{}$ + $O_{2}$ → $2ZnO_{}$ (đk: $t^{o}$ cao)
$Zn_{}$ + $2HCl_{}$ → $ZnCl_{2}$ + $H_{2}↑$
$ZnCl_{2}$ + $2NH_{3}$ + $2H_{2}$$O_{}$ → $Zn(OH)_{2}↓$ + $2NH_{4}$$Cl_{}$
$Zn(OH)_{2}$ → $ZnO_{}$ + $H_{2}$$O_{}$ (đk: $t^{o}$ cao)
b)
$C_{}$ + $O_{2}$ → $CO_{2}$ (đk: $t^{o}$ cao)
$Ca(OH)_{2}$ + $CO_{2}$ → $CaCO_{3}$ + $H_{2}$$O_{}$
$CaCO_{3}$ → $CaO_{}$ + $CO_{2}$ (đk: $t^{o}$ cao)
$CO_{2}$ + $H_{2}$$O_{}$ ↔ $H_{2}$$CO_{3}$
c)
$2Mg_{}$ + $O_{2}$ → $2MgO_{}$ (đk: $t^{o}$ cao)
$MgO_{}$ + $H_{2}$$SO_{4}$ → $MgSO_{4}$ + $H_{2}$$O_{}$
$MgSO_{4}$ + $2NaOH_{}$ → $Mg(OH)_{2}↓$ + $Na_{2}$$SO_{4}$
$Mg(OH)_{2}$ → $MgO_{}$ + $H_{2}$$O_{}$ (đk: $t^{o}$ cao)
d)
$4P_{}$ + $5O_{2}$ → $2P_{2}$$O_{5}$ (đk: $t^{o}$ cao)
$P_{2}$$O_{5}$ + $3H_{2}$$O_{}$ → $2H_{3}$$PO_{4}$
$2H_{3}$$PO_{4}$ + $3Fe_{}$ → $Fe_{3}$$(PO_{4})_{3}$ + $3H_{2}↑$ (đk: $t^{o}$ cao)
#HONKAI IMPACT
