標題:
發問:
我想問下點解有d ions..好似copper咁...有copper (II) 又有copper(III) 佢地係點解可以lose兩粒electrons又可以lose 3粒electrons?
最佳解答:
1. copper沒有copper(III), 只有copper(I) 和copper (II) shall I use English to explain? 2. Copper is a transition metal because It has available d-orbitals in both metal form and ion forms. Therefore It has low successive ionization enthalphy. Copper has [Ar]3d104s1 structure, in order to get a fully-filled d-orbital, Copper has to lose its 4s orbital in order to obtain extra stability. So, Copper (I) is formed. However, Copper (1) compounds are unstable in aqueous forms but they are quite stable in solid form. It is because, when copper(I) dissolves in water, it involves a hydration process, this process is highly exothermic. Since the energy envolved in this process is sufficient to cause the second ionization energy of copper, (hydration energy> second ionization energy) so disproportionation will occur, 2Cu+ ----> Cu2+ + Cu copper (I) will disproportionate to copper (II) and copper. So copper (II) is formed. 3. there is no copper (III) in the world. Because Cu(III) is energetically unstable (no fully-filled d-orbital and s-orbital). Also, the third ionization enthalphy is higher than the hydration enthalphy of Cu(II) or Cu(I), the energy envolved is not enough to ionize the third outermost electron of Copper you can contact me if you have any problem in chemistry/physics/astronomy/history and philosophy 2008-05-05 18:36:47 補充： line 9: Since the energy envolved in this process is sufficient to ionize the second valence electron of copper In 3: the energy envolved in the hydration process is not sufficient to ionize the third valence electron of copper 2008-05-05 18:36:56 補充： 1: Due to the low successive ionization energy, copper can ionize some electrons reasonably (but not all)
其他解答:
此文章來自奇摩知識+如有不便請留言告知
關於ion既問題..chem勁人入黎發問:
我想問下點解有d ions..好似copper咁...有copper (II) 又有copper(III) 佢地係點解可以lose兩粒electrons又可以lose 3粒electrons?
最佳解答:
1. copper沒有copper(III), 只有copper(I) 和copper (II) shall I use English to explain? 2. Copper is a transition metal because It has available d-orbitals in both metal form and ion forms. Therefore It has low successive ionization enthalphy. Copper has [Ar]3d104s1 structure, in order to get a fully-filled d-orbital, Copper has to lose its 4s orbital in order to obtain extra stability. So, Copper (I) is formed. However, Copper (1) compounds are unstable in aqueous forms but they are quite stable in solid form. It is because, when copper(I) dissolves in water, it involves a hydration process, this process is highly exothermic. Since the energy envolved in this process is sufficient to cause the second ionization energy of copper, (hydration energy> second ionization energy) so disproportionation will occur, 2Cu+ ----> Cu2+ + Cu copper (I) will disproportionate to copper (II) and copper. So copper (II) is formed. 3. there is no copper (III) in the world. Because Cu(III) is energetically unstable (no fully-filled d-orbital and s-orbital). Also, the third ionization enthalphy is higher than the hydration enthalphy of Cu(II) or Cu(I), the energy envolved is not enough to ionize the third outermost electron of Copper you can contact me if you have any problem in chemistry/physics/astronomy/history and philosophy 2008-05-05 18:36:47 補充： line 9: Since the energy envolved in this process is sufficient to ionize the second valence electron of copper In 3: the energy envolved in the hydration process is not sufficient to ionize the third valence electron of copper 2008-05-05 18:36:56 補充： 1: Due to the low successive ionization energy, copper can ionize some electrons reasonably (but not all)
其他解答:
全站熱搜
留言列表
