1 1. (6 pts) Give the oxidation state of the central metal atom in each ...
1 1. (6 pts) Give the oxidation state of the central metal atom in each ... 1 1. (6 pts) Give the oxidation state of the central metal atom in each ...
1 1. (6 pts) Give the oxidation state of the central metal atom in each of the following coordination compounds and the coordination number. Oxidation State Coordination Number [Co(en) 2 Br 2 ]Cl K 4 [Fe(CN) 6 ] [FeOH(H 2O) 5]Cl 2 2. (4 pts) Give the systematic name for the following compounds. [FeOH(H 2O) 5]Cl 2 3. (4 pts) Write the chemical formulas for the following compounds. Bis(ethylenediamine)dinitroiron(III)chloride 4. (6 pts) Draw the optical isomers of the octahedral complex [Ni(en) 2 Cl 2 ].
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- Page 4: 4 11. (8 pts) Oxidation of a primar
1<br />
<strong>1.</strong> (6 <strong>pts</strong>) <strong>Give</strong> <strong>the</strong> <strong>oxidation</strong> <strong>state</strong> <strong>of</strong> <strong>the</strong> <strong>central</strong> <strong>metal</strong> <strong>atom</strong> <strong>in</strong> <strong>each</strong> <strong>of</strong> <strong>the</strong> follow<strong>in</strong>g coord<strong>in</strong>ation<br />
compounds and <strong>the</strong> coord<strong>in</strong>ation number.<br />
Oxidation State<br />
Coord<strong>in</strong>ation Number<br />
[Co(en) 2 Br 2 ]Cl<br />
K 4 [Fe(CN) 6 ]<br />
[FeOH(H 2O) 5]Cl 2<br />
2. (4 <strong>pts</strong>) <strong>Give</strong> <strong>the</strong> systematic name for <strong>the</strong> follow<strong>in</strong>g compounds.<br />
[FeOH(H 2O) 5]Cl 2<br />
3. (4 <strong>pts</strong>) Write <strong>the</strong> chemical formulas for <strong>the</strong> follow<strong>in</strong>g compounds.<br />
Bis(ethylenediam<strong>in</strong>e)d<strong>in</strong>itroiron(III)chloride<br />
4. (6 <strong>pts</strong>) Draw <strong>the</strong> optical isomers <strong>of</strong> <strong>the</strong> octahedral complex [Ni(en) 2 Cl 2 ].
2<br />
5. A solution made by dissolv<strong>in</strong>g 0.875 g <strong>of</strong> Co(NH 3 ) 4 Cl 3 <strong>in</strong> 25.0 g <strong>of</strong> water freezes at –0.56 o C.<br />
a) (6 <strong>pts</strong>) Calculate <strong>the</strong> number <strong>of</strong> ions produced when 1 mole <strong>of</strong> Co(NH 3 ) 4 Cl 3 is dissolved <strong>in</strong> water.<br />
b) (4 <strong>pts</strong>) Suggest a structure for <strong>the</strong> complex ion.<br />
6. (6 <strong>pts</strong>) Which <strong>of</strong> <strong>the</strong> follow<strong>in</strong>g has <strong>the</strong> lowest freez<strong>in</strong>g po<strong>in</strong>t Circle <strong>the</strong> answer.<br />
0.1 m Na 3 PO 4 0.35 m NaCl 0.2 m MgCl 2 0.35 m CH 3 COOH<br />
7. (6 <strong>pts</strong>) Draw <strong>the</strong> d-orbital diagram for <strong>the</strong> complex K 3 [Mn(CN) 6 ]. Cyano is a strong field ligand. How many<br />
unpaired electrons are <strong>the</strong>re
3<br />
8. (8 <strong>pts</strong>) Draw <strong>the</strong> structure for <strong>each</strong> <strong>of</strong> <strong>the</strong> follow<strong>in</strong>g compounds. Draw cis and trans isomers if <strong>the</strong>re are any.<br />
a) 2,3-dimethyl-2-butene<br />
b) 3-methyl-2-pentene<br />
c) 4,4-dimethylcyclohexanol<br />
9. Complete <strong>the</strong> follow<strong>in</strong>g acid catalyzed esterification reactions.<br />
a) (5 <strong>pts</strong>) CH 3 COOH + CH 3 OH —><br />
b) (5 <strong>pts</strong>) CH 3 CH 2 OH + HCOOH —><br />
10. (8 <strong>pts</strong>) The term pro<strong>of</strong> is def<strong>in</strong>ed as twice <strong>the</strong> percent by volume <strong>of</strong> pure ethanol <strong>in</strong> solution. Thus, a solution<br />
that is 95% ethanol by volume is 190 pro<strong>of</strong>. What is <strong>the</strong> molarity <strong>of</strong> ethanol <strong>in</strong> a 92 pro<strong>of</strong> ethanol/water<br />
solution The density <strong>of</strong> ethanol is 0.80 g/cm 3 .
4<br />
1<strong>1.</strong> (8 <strong>pts</strong>) Oxidation <strong>of</strong> a primary alcohol produces an aldehyde, which oxidizes fur<strong>the</strong>r to produce a carboxylic acid.<br />
Oxidation <strong>of</strong> a secondary alcohol produces a ketone. No reaction is observed for <strong>the</strong> <strong>oxidation</strong> <strong>of</strong> a tertiary alcohol.<br />
Draw <strong>the</strong> structure <strong>of</strong> 2-methyl-1-butanol and <strong>the</strong> structures <strong>of</strong> <strong>the</strong> product(s) formed from <strong>the</strong> <strong>oxidation</strong> <strong>of</strong><br />
2-methyl-1-butanol.<br />
12. The structure <strong>of</strong> <strong>the</strong> polymer used <strong>in</strong> a freezer wrap can be described as follows.<br />
[–CCl 2 –CH 2 – CCl 2 –CH 2 – CCl 2 –CH 2 – CCl 2 –CH 2 – CCl 2 –CH 2 – CCl 2 –CH 2 –– CCl 2 –CH 2 –] n<br />
a) (4 <strong>pts</strong>) What is <strong>the</strong> simplest repeat<strong>in</strong>g unit for this polymer<br />
Polymers will not be covered on this exam.<br />
b) (4 <strong>pts</strong>) What monomer must be used to produce this polymer<br />
13. a) (4 <strong>pts</strong>) Draw cyclohexanol and a ketone that is an isomer <strong>of</strong> cyclohexanol.<br />
b) (4 <strong>pts</strong>) Draw 2-butanone and an aldehyde that is an isomer <strong>of</strong> 2-butanone.<br />
14. (8 <strong>pts</strong>) Calculate <strong>the</strong> freez<strong>in</strong>g-po<strong>in</strong>t <strong>of</strong> an antifreeze solution that is 45% by mass ethylene glycol<br />
(HOCH 2 CH 2 OH) <strong>in</strong> water. K f = <strong>1.</strong>86 o C kg/mol
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