CBSE Class 12 Chemistry Coordination Compound Notes and Questions

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Assignment for Class 12 Chemistry Unit 09 Coordination Compounds

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Unit 09 Coordination Compounds Class 12 Chemistry Assignment

The compounds which contain dative bonds between metal atom and surrounding species is called co-ordination compounds .
The branch of inorganic chemistry which deals with hte study of preparation properties of coordination compound is called co-ordination chemistry.

K4[Fe(CN)6],    [CuNH3)4]SO4

 

POINTS TO REMEMBER:

 

1.Coordination compounds

Coordination compounds are compounds in which a central metal atom or ion  is linked to a

number of ions or neutral molecules by coordinate bonds or which contain complex ions. Examples- K4[Fe(CN)6]; [ Cu(NH3)4]SO4; Ni(CO)4

 2.The main postulates of Werner’s theory of coordination compounds

i) In coordination compounds metals show two types of linkages or valencies- Primary and Secondary.

ii) The primary valencies are ionisable and are satisfied by negative ions.

iii) The secondary valencies are non- ionisable and are satisfied by neutral molecules or negative ions. The secondary valence is equal to the C.N and is fixed for a metal.

iv) The ions or groups bound by secondary linkages to the metal have characteristic spatial arrangements corresponding to different coordination nos.

 

3.Difference between a double salt and a complex

 

Both double salts as well as complexes are formed by the combination of two or more stable compounds in stoichiometric ratio. 
However, double salts such as carnallite, KCl.MgCl2.6H2O, Mohrsalt, FeSO4.(NH4)2SO4.6H2O, potash alumKAl(SO4)2.12H2O, etc. dissociate into simple ions completely when dissolved in water. 
However, complex ions such as [Fe(CN)6]4 of K4[Fe(CN)6] do not dissociate into Fe2+ and CN  ions.

 

IMPOTANT TERMINOLOGY

(i) Coordination entity: It constitutes the central metal ion or atom bonded to a fixed number of ions or molecules represented within a square bracket.

(ii) Central atom/ ion: In a coordination entity, 
the atom/ion to which a fixed number of ions/groups are bound in a definite geometrical arrangement around it, is called the central atom or ion.

iii) Ligands: The neutral or negative ions bound to the central metal or ion in the coordination entity. 
These donate a pair/s of electrons to the central metal atom /ion. Ligands may be classified as-

a)  Monodentate/Unidentate: Ligands bound to the central metal atom/ion through a single donor atom. Ex- Cl-  ; H2O ; NH ; NO2-.

 

Coordination Compounds

Please refer to more CBSE Class 12 Chemistry Coordination Compound Notes and Questions

Unit 12 Aldehydes, Ketones and Carboxylic Acids
CBSE Class 12 Chemistry Aldehydes Ketons Carboxylic Acids Questions

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CBSE Class 12 Chemistry Unit 09 Coordination Compounds Assignment

We hope you liked the above assignment for Unit 09 Coordination Compounds which has been designed as per the latest syllabus for Class 12 Chemistry released by CBSE. Students of Class 12 should download and practice the above Assignments for Class 12 Chemistry regularly. We have provided all types of questions like MCQs, short answer questions, objective questions and long answer questions in the Class 12 Chemistry practice sheet in Pdf. All questions have been designed for Chemistry by looking into the pattern of problems asked in previous year examinations. 

Assignment for Chemistry CBSE Class 12 Unit 09 Coordination Compounds

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Unit 09 Coordination Compounds Assignment Chemistry CBSE Class 12

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Unit 09 Coordination Compounds Assignment CBSE Class 12 Chemistry

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