1.H2+I2 2.AlCl3+H2O 3.Fe+H2O 4.2H2O=2H2+O2 5.2 Na+O2=2Na2O 6. 2Ba+Cl2=BaCl2 7. H2SO4+CuO=CuSo4+H2O 8. 2Al+3S=Al2S3 9. Zn+2HCl=ZnCl2+H2