2Сa + O₂ = 2CaO
CaO + H₂O = Ca(OH)₂
Ca(OH)₂ + CO₂ = CaCO₃ + H₂O
Ca(OH)₂ + 2HCl = CaCl₂ + 2H₂O
CaO + 2HCl = CaCl₂ + H₂O
CaCO₃ = CaO + CO₂ (t)
При охлаждении тела сжимаются.
1. 2Al + 6HCl = 2AlCl3 + 3H2
2. AlCl3 + 3KOH = Al(OH)3 + 3KCl
3. Al(OH)3 = AlO + H2O
4. Al2O3 + 2NaOH + 3H2O = 2Na[Al(OH)4]
5. 2Na[Al(OH)4] + 4H2SO4 = Na2SO4 + Al2(SO4)3 + 4H2O
6. Al2(SO4)3 + 6NaOH = 2Al(OH)3 + 3Na2SO4
7. 2Al(OH)3 + 3MgCl2 = 2AlCl3 + 3Mg(OH)2
8. AlCl3 + 4NaOH = 3NaCl + Na[Al(OH)4]
1) AL+3O2=2AL2O3 - реакция соединения.
2) cuso4+mg=mgso4=cu - реакция замещения
Ar(C6H12O6)=12*6+12*1+16*6=180