1Chemistry 2C Review II: May 12 th, 2010 Review II Exam Format 10 Multiple Choice Questions 2 Short Answer Questions 1 Long Answer Question

2Chemistry 2C Review II: May 12 th, 2010 True/false Tetrahedral complexes can never be optically active The tetrahedral complex [ZnCl 2 (NH 3 ) 2 ] has two geometric isomers (cis and trans) According to periodic trends chromium has a smaller metallic radius than titanium Metals toward the middle of the transition metal series tends to exist in more oxidation states than those near the edges. Nitrite is a bidentate ligand

3Chemistry 2C Review II: May 12 th, 2010 Isomers Which complex is optically active? e) None of the above

4Chemistry 2C Review II: May 12 th, 2010 ABAB One complex ion is yellow, the other one is red. Which one is the yellow one? (Answer either A or B in the box) How many unpaired electrons does isomer A have? Below are shown two complex ions (labeled A and B, respectively).

5Chemistry 2C Review II: May 12 th, 2010 ABAB One complex ion is yellow, the other one is red. Which one is the yellow one? (Answer either A or B in the box) Below are shown two complex ions (labeled A and B, respectively). Spectrochemical Series: CN - > CO > NO 2 - > en > NH 3 > SCN - > H 2 O > ONO - > ox 2- > OH - > F - > SCN - > Cl - > Br - > I -

6Chemistry 2C Review II: May 12 th, 2010 The ligand field splitting for a given complex is found to be 260 kJ/mol. (a)What wavelength does the complex absorb? What color does the complex appear? (explain why)

7Chemistry 2C Review II: May 12 th, 2010 True/False Iodide has a higher melting point than chlorine Sulfur has a larger atomic radius than aluminum All main group metals form ionic hydrides The higher the metallic character of a metal, the more basic its oxide.

8Chemistry 2C Review II: May 12 th, 2010 Which of the following transition metals exhibits the highest number of oxidation states? 1.Yttrium (Y) 2.Scandium (Sc) 3.Zinc (Zn) 4.Chromium (Cr) 5.Manganese (Mn) Based on periodic trends, which of the following elements do you expect to have the highest ionization energy? 1.He 2.I 3.F 4.H 5.K A transition metal chloride reacts with sodium hydroxide to form a metal hydroxide product. The metal chloride was originally purple (  magenta) in color. What is the likely color of the product? Green Blue Red Cyan Impossible to tell

9Chemistry 2C Review II: May 12 th, 2010 (6 pts) Of the following ligands, which one will result in the largest crystal field splitting (  0 )? (a)H 2 O (b)I – (c)en (d)EDTA 4– (e)OH – (6 pts) Based on periodic trends, which do expect to be the strongest reducing agent? Boron Carbon Nitrogen Oxygen Fluorine (6 pts) Which of the following elements does not commonly exist in oxidation state +1? H Cs Tl Ag Mn (6 pts)Which of the following compounds has more ionic character? 1.HCl (g) 2.BaO (s) 3.CH 4 (g) 4.SiCl 4 (s) 5.Al 2 O 3

10Chemistry 2C Review II: May 12 th, 2010 Which of the following complex ion would you expect to have the largest overall K f and why? [Co(H 2 0) 6 ] 3+ [Co(en) 2 Cl 2 ] 3+ [Co(H 2 O) 6 ] 3+ [Co(H 2 O) 4 (en)] 3+

11Chemistry 2C Review II: May 12 th, 2010 What if you compared to this Complex? [Co(EDTA)] 3+

12Chemistry 2C Review II: May 12 th, 2010 Arrange each of the following elements in order of increasing atomic radius. a)F, P, S, As F < S < P < As b) B, Ca, Ga, Cs B < Ga < Ca < Cs c) Na, Al, P, Cl, Mg Cl < P < Al < Mg < Na

13Chemistry 2C Review II: May 12 th, 2010 Arrange the following in order of increasing first ionization energy. a)Na, Cl, Al, S, Cs Cs < Na < Al < S < Cl b) F, K, P, Ca, Ne K < Ca < P < F < Ne c) Ne, Na, P, Ar, K K < Na < P < Ar < Ne