Chemistry - Metallurgy Question with Solution | TestHub
In order to concentrate galena (which contains ZnS as impurity) by froth-floatation process, sodium cyanide is used as depressant. NaCN dissolves ZnS due to formation of water soluble complex(A).
Find the value of w + x + y + z.
where w = coordination number of central metal ion in complex ion of (A)
x = number of unpaired electrons in (A).
y = total number of possible linkage isomers of (A) including (A).
z = maximum number of atoms in a single plane in the complex ion of (A).
Answer:
Solution:
The water-soluble complex (A) formed is ²⁻.
(Coordination Number) = 4, as there are four monodentate ligands attached to ²⁺.
(Unpaired Electrons) = 0, because ²⁺ has a completely filled ¹⁰ electronic configuration.
(Linkage Isomers) = 5, corresponding to the combinations of C-bonded and N-bonded ligands: and .
(Max Atoms in a Plane) = 5, consisting of the central atom and two linear groups lying entirely in one plane.
Therefore, .
