1.Fe(OH)3-->Fe2O3+H2O
2.AL2O3+H2SO4-->AL(SO4)3+H2O
3.HCL+Cr2O3-->CrCL3+H2O
4.Na+H2O-->NaOH+H2
5.AL+O2-->AL2O3
6.ALCL3+NaOH-->AL(OH)3+NaCL
7.FeO3+HNO3-->Fe(WO3)3+H2O
8.AL+L2-->ALI3
9.Fe2O3+H2-->Fe+H2O​

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