1. PbO+2HNO3=Pb(NO3)2+H2O
2. Cr(OH)2=CrO+H2O
3. 2Al+3Br2=2AlBr3
4. 2NaI+Cl2=2NaCl+I2
1. BaO+H2O=Ba(OH)2
2. Fe+2HCl=FeCl2+H2↑
3. Al2O3+6HNO3=2Al(NO3)3+3H2O
4. Fe2O3*3H2O (Fe(OH)3)=Fe2O3+3H2O
1. PbO+2HNO3=Pb(NO3)2+H2O
2. Cr(OH)2=CrO+H2O
3. 2Al+3Br2=2AlBr3
4. 2NaI+Cl2=2NaCl+I2
1. BaO+H2O=Ba(OH)2
2. Fe+2HCl=FeCl2+H2↑
3. Al2O3+6HNO3=2Al(NO3)3+3H2O
4. Fe2O3*3H2O (Fe(OH)3)=Fe2O3+3H2O