A:NH 4+ +H2O⇌NH3•H2O+H+
B:Br﹣+H2O⇌HBr+OH﹣
C:CO 32− +2H2O⇌H2CO3+2OH﹣
D:Fe3++3H2O⇌Fe(OH)3↓+3H+
①CH3CH═CH2+Br2→CH3CHBrCH2Br
②CH3CH2OH →△浓H2SO4 CH2═CH2↑+H2O
③CH3COOH+CH3CH2OH →△浓H2SO4 CH3COOCH2CH3+H2O
④C6H6+HNO3 →△浓H2SO4 C6H5NO2+H2O.