5 Written Questions

1. Green
2. Yellow to red-orange (depending on anion and charge of Fe); in rare cases, can form complex ion with a deep blue color
3. Dark Blue; produced when ammonia is added to Cu2+ solutions
4. blue-green
5. Colorless/Milky

5 Matching Questions

1. Fe2+
2. CrO42-
3. FeSCN2+
4. Cr3+
5. MnO4-

1. a Yellow
2. b yellow-green (depending on the anion)
3. c Violet (Cr(NO3)3 to Green (CrCl3)
4. d Purple (Mn w/ +7 oxidation state is purple)
5. e Red-brown, Wine-red to dark orange

5 Multiple Choice Questions

1. Orange
   1. Cr2O72-
   2. CrO42-
   3. Co2+
   4. CoCl42-
2. violet
   1. V2+
   2. Zn2+
   3. Ni2+
   4. V3+
3. Blue (Co2+ with HCl will form a CoCl42- complex that is blue)
   1. Co2+
   2. Cr2O72-
   3. CoCl42-
   4. CrO42-
4. Purple
   1. Cr3+
   2. Ti(H2O)63+
   3. Cu(NH3)42+
   4. Ni2+
5. orange-red (depending on the anion)
   1. Cr3+
   2. Fe
   3. Fe3+
   4. Fe2+

5 True/False Questions

1. Mn2+ → Colorless/Milky

   True        False

2. Transition element ions with partially filled d orbitals → tend to release colored light.

   True        False

3. Al, K, Li, Mg, Na, Ca, Ba, Sr, Zn → Purple (Mn w/ +7 oxidation state is purple)

   True        False

4. Cu2+ → Blue

   True        False

5. Pb3+ → orange-red (depending on the anion)

   True        False