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LESSON 9.
COMPLEX (COORDINATION) COMPOUNDS.
Required base level.
Conception about complex compounds. The law of mass action for chemical
equilibria. Principles of compounding names.
Questions for the preparation for the lesson.
1. Classification and structure of complex compounds.
2. Nomenclature of complex compounds by IUPAC.
3. Werner’s theory:
a) the outer and inner spheres of complex compounds;
b) central atom, coordination number, ligands.
4. Stability of complex compounds. Constant of instability and stability.
5. Metal-complex equilibria and processes, competition for the ligand, and
competition for the central atom.
6. Metal-complex equilibria in the life processes.
7. The use of complex compounds in medicine.
Input test-control on the topic “Complex compounds”
Homework exercises.
1. Finish the complexation equations:
a) Cu (NO
3
)
2
+ NH
3excess
. …
b) AgNO
3
+ KI
excess.
…
c) FeCl
3
+ KCN
excess.
…
d) Hg (NO
3
)
2
+ KCNS
excess
…
Name the complex compounds obtained. Write the equations of dissociation
of the complex, write the equations for calculating the K
instab.
2. Write the formulas of the following complex compounds:
a) brompentaammine cobalt (III) sulfate; b) potassium tetranitrodiammine
cobaltate (II); c) sodium tetraiodmercurate (II); d) phosphatotriaquachromium
(III); e) potassiumpentacyanonitrosoferrate (III); (e) diamminedichloroplatinum
(II). Solutions of which of the above-mentioned complex compounds will not
conduct an electric current?
3. Platinum ions Pt
4
+
and ammonia are not detected in the solution of the
complex salt PtCl
4
×3NH
3.
Silver nitrate from the solution precipitates ¼ part
of the chlorine entering into it. Set the coordination formula for the complex
compound. Give the equation for the ion exchange reaction betweenAgNO
3
and
this complex.