Đá vôi-> vôi sống-> vôi tôi-> clorua vôi-> canxi fomiat-> thạch cao-> thạch cao nung.
E cảm ơn^_^
(1) CaCO3 -to-> CaO + CO2
(2)CaO + H2O -> Ca(OH)2
(3)Ca(OH)2 + Cl2 -to-> CaOCl2 + H2O
(4) CaOCl2 + 2HCOOH -> (HCOO)2Ca + Cl2 + H2O
(5) (HCOO)2Ca + H2SO4 -> 2HCOOH + CaSO4
(6) H2O + CaSO4 -to-> CaSO4.H2O
A giúp e mấy pt này luôn:
NaAlO2-> NaOH
Al->NaAlO2
Al(OH)3-> NaAlO2
Al->Ba(AlO2)2
Al2O3-> Ba(AlO2)2
Al(OH)3-> Ba(AlO2)2
Al2S-> Al(OH)3
(1) NaAlO2+H20->Al(OH)3+NaOH
(2) 2NaOH + 2Al +2H20-> 3 H2+ 2NaAlO2
(3) Al(OH)3+NaOH->H2O + NaAlO2
(4) Ba(OH)2+2H20 + 2Al ->2H2O + Ba(AlO2)2
(5) Ba(OH)2 + Al2O3 ->Ba(AlO2)2+H20
(6) Ba(OH)2+ 2Al(OH)3->Ba(AlO2)2+4H20
(7) Al2S3+6H20->3H2S+ 2Al(OH)3