Advertisements
Advertisements
Questions
Write four postulates of Werner’s theory.
Describe briefly the main postulates of Werner’s theory.
Advertisements
Solution
Postulates of Werner’s theory:
- Postulate (1): Unlike metal salts, the metal in a complex possesses two types of valencies: primary (ionizable) valency and secondary (nonionizable) valency.
- Postulate (2): The ionizable sphere consists of entities which satisfy the primary valency of the metal. Primary valencies are generally satisfied by anions.
- Postulate (3): The secondary coordination sphere consists of entities which satisfy the secondary valencies and are non ionizable. The secondary valencies for a metal ion are fixed and satisfied by either by anions or neutral ligands. Number of secondary valencies is equal to the coordination number
- Postulate (4): The secondary valencies have a fixed spatial arrangement around the metal ion.
APPEARS IN
RELATED QUESTIONS
Answer the following in one or two sentences.
What is the shape of a complex in which the coordination number of the central metal ion is 4?
The charge on metal ion in [Fe(CN)6]4− is _________
Draw structure of Ethylenediaminetetraacetate ion.
Write coordination number of Fe3+ in [Fe(C2O4)3]3− complex ion.
Write chemical composition of carnalite.
Write oxidation number of iron in [Fe(CO)5]
Distinguish between double salt and coordination complex.
Define Anionic sphere complex.
Define coordination number.
The coordination number and oxidation state of Cr in K3[Cr(C2O4)3] are respectively ____________.
The coordination number of central metal atom/ion in a complex is ____________.
Which among the following is a correct formula of Pentammineaquacobalt (III) iodide?
Which oxidation states CORRECTLY represent the usual range exhibited by the stated metal?
The charge number and coordination number of 2+ the complex [Co(en)2Cl2]2+ are ____________ respectively.
Identify the formula of potassiumtrioxalatoaluminate (III).
What is the total number of ligands present in [CoCl2(NH3)4]Cl?
According to Werner's theory based on experiment the formula of coordination compound is CoCl3.3NH3 then the molar conductance in mho mol−1 and number of Cl− ions precipitated by AgNO3 respectively is ____________.
What is the value of primary valence of copper chloride according to Werner's theory?
Which of the following is a property of coordination compound and not of double salt?
Which of the following types of valences, according to Werner's theory is also called as primary valence?
The correct charge on and co-ordination number of 'Fe' in K3[Fe(CN)6] is ______.
Find out the oxidation state of cobalt ions in the complex [Co(NH3)5Br]S04.
What do you know about counter ion?
