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Chapter 23: Q78P (page 1022)

When MCl4(NH3)2is dissolved in water and treated with AgNO3, 2 mol of AgCl precipitates immediately for each mole of MCl4(NH3)2. Give the coordination number of M in the complex.

Short Answer

Expert verified

The coordination no. of the central metal ion is 4.

Step by step solution

01

Concept used – Coordination 

Coordination number is the number of ligands directly attached to a central metal ion in a coordination compound. These ligands can be ions, atoms, or molecules.

02

Elucidation of coordination number

Because 2 mol of AgCl precipitates immediately for each mol of MCl4(NH3), while writing the actual formula of this coordination compound, we have to put 2Cl- counter ions outside the brackets, which means they can easily dissolve in water:MCl2NH32Cl2

The most common coordination number is 6, but it is also not rare to see 2 and 4 as coordination numbers; so, the central metal ion in this compound has coordination number 4.

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Most popular questions from this chapter

Give the number of d electrons ( n of dn) for the central metal ion in (a) [TiCl6]2-; (b) K[AuCl4]; (c) [RhCl6]3-.

For any of the following that can exist as isomers, state the type of isomerism and draw the structures:

(a) [Zn(en)F2]

(b) [Zn(H2O)(NH3)FCl]

(c) [Pd(CN)2(OH)2]2-

How is a complex ion a Lewis adducts?

The green patina of Cu-alloy roofs results from corrosion in the presence ofO2,H2O,CO2, and sulfur compounds. The other members of Group 1B(11) Agand Au, do not form a patina. Corrosion of Cuand Agin the presence of sulfur compounds leads to a black tarnish, but Au does not tarnish. This pattern is different from that in Group 1A(1), where ease of oxidation increases down the group. Explain these different group patterns.

Which of these ligands can participate in linkage isomerism?

  1. NO2-
  2. SO2
  3. NO3-

Explain with Lewis structures.
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