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| | | Message 1 of 4 in Discussion |
| From:  Albert1145 (Original Message) | Sent: 4/16/2008 8:29 AM |
Hi Steve,
Thank you for the link, its really helpful!
I got more questions though, could you pleasecheck if I've got the right answers? I've marked my answers with -*- at the end.
Q2 How many unpaired electrons are present in the complex ion [Fe(H2O)6]3+? (water - weak field ligand)
5
4 *
0
2
3
Q3 The oxidation state of the central metal ion in the complex ion [CoCl2(NH3)4]+ is:
5+
4+
2+
6+
3+ *
Q5 The oxidation state of the central metal ion in the complex [CrCl4(H2O)2]- is:
5+
4+
3+ *
6+
2+
Q6 The spin only magnetic moment for the complex [Fe(H2O)6]2+ is (water - weak field ligand):
5.92 BM
1.73 BM
3.88 BM
4.90 BM *
2.83 BM
Q7 The complex ions of Zn2+ are all colourless. The most likely explanation for this is:-
�Zn2+ is paramagnetic
�none of these statements is correct.
�Zn2+ is an alkali metal.
�Zn2+ exhibits d orbital splitting in its complexes such that they absorb all wavelengths in the visible region. *
�since Zn2+is a d10 ion, it does not absorb visible light even though the d orbital splittings are correct for absorbing visible wavelengths.
Q10 The spin only magnetic moment for the complex [Cr(H2O)6]2+ is (water - weak field ligand):
3.88 BM
4.90 BM *
2.83 BM
5.92 BM
1.73 BM
Q11 Which of the following d orbital splitting diagrams is correct for the complex ion K4[Fe(CN)6]?
� (dxy)2 (dxz)2 (dzy)1 (dx2-y2) (dz2)
�none of these listed here *
�(dxy)1(dxz)1 (dzy)1 (dx2-y2)2 (dz2)2
�(dxy)2 (dxz)2 (dzy)2 (dx2-y2)1 (dz2)
�(dxy)2 (dxz)2 (dzy)2 (dx2-y2)(dz2)
Q12 The complex ion [Fe (CN)6]4- is classified as
�intermediate spin
�impossible to predict
�reduced spin
�high spin
�low spin *
Thank you very much
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