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Cân = PT với ạ Ca (OH)2 + H3PO4 ---> Ca3(PO4)2 + H2O 2) Fe (OH)3 ---> Fe2O3 + H2O 3) CxHy + O2 ---> CO2 + H2O 4) P2O5 + H2O ---> H3PO4 5) Fe3O4 + CO ---> Fe + CO2 6) KOH + H3PO4 ---> K3PO4 + H2O 7) K3PO4 + Ba(NO3)2--->Ba3(PO4)2 +KNO3 8) Na2O + P2O5 ---> Na3PO4 9) FexOy + CO ---> Fe + CO2 10) Fe3PO4 + H2SO4 ---> FeSO4 + Fe2(SO4)3 + H2O 11) Fe3O4 +HCL ---> FeCl3 + FeCl2 + H2O
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