摘要: .铝热反应.焊接铁轨.冶炼金属, 3Fe+8H++2NO3-=3Fe2++2NO↑+4H2O (2)6H2O +6e - =3H2↑+6OH - ②:2SO2+O22SO3 ③:2Fe+6H2SO4(浓) Fe2(SO4)3+3SO2↑+6H2O

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