Download First Year Undergraduate Inorganic Chemistry Workbook PDF

TitleFirst Year Undergraduate Inorganic Chemistry Workbook
File Size462.7 KB
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Page 58

CHEMISTRY SUPPORT WORKBOOK INORGANIC CHEMISTRY

COORDINATION CHEMISTRY ANSWERS -56-

9. a) NH3 = ammine = uncharged.
So oxidation state of Co = +3.

hexaamminecobalt (III)

b) SCN- = thiocyanate = -1
NH3 = ammine = uncharged.
Overall charge on ion = +2, so oxidation state of Cr = +3.

pentaaminethiocyanatechromium (III)

c) ammine = NH3 = uncharged.
carbonato = CO3

2- = -2
iron = +3
-2 +3 = Charge on ion = +1, so one chloride required to balance charge.

[Fe(NH3)5(CO3)]Cl

d) ammine = NH3 = uncharged.
chloro = Cl- = -1
cobalt = +3.
-1 + 3 = Charge on ion = +2, counter balanced by one sulfate = -2.

[Co(NH3)5Cl]SO4


e) carbonyl = CO = uncharged
iodo = I- = -1, it’s diiodo so total = 2 x -1 = -2.
Oxidation state of Rh = 1, so charge on ion = -2 + 1 = -1.

[Rh(CO)2I2]

-



f) chloro = Cl - = -1, it’s dichloro so total = 2 x -1 = -2
en = ethylenediamine = uncharged.
cobalt = Co3+, so oxidation state of +3.
Overall charge on ion = -2 + 3 = +1.

[CoCl2(en)2]

+



10. a) H2O is monodentate.
NH3 is monodentate.

en is ethylenediamine and is bidentate, represented by N N




Co

OH2
N

NN

N

NH3

Co

OH2
NH3

NN

N

N

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