将4g铜(过量)与10ml浓硝酸充分反应,将生成的气体收集于大试管中,得气体1.68L,剩余铜0.8g.

2个回答

  • 溶液中3.2g铜离子,0.05mol,对应0.1mol硝酸根.

    气体1.68L,0.075mol,对应0.075mol氮原子所以反应前0.075mol硝酸根.

    硝酸原浓度 0.175mol / 0.01L = 17.5 mol/L

    通入氧气为氧化剂,相当于将原3.2g铜全部氧化.氧化0.05mol铜需要0.025mol氧气,体积为0.56L