Question

The primary valency of Fe in K3[Fe(CN)6] is
a) 3
b) 2
c)1
d) zero​

Answer 1

Answer:

valency 3

other reports

Potassium ferricyanide

Potassium ferricyanide is the chemical compound with the formula K3[Fe(CN)6]. This bright red salt contains the octahedrally coordinated [Fe(CN)6]3− ion. It is soluble in water and its solution shows some green-yellow fluorescence.

Answer 2

The primary valency of Fe is 3.

• In metal complexes, the primary valency of the central metal atom defines the oxidation state of the metal and secondary valency defines the coordination number.
• Let the oxidation state of Fe be x.
• The charge of K is +1 and CN is -1.
• So, we can write-
• $x + 3 - 1 \times 6 = 0 \\ x = + 3$
• The value of x is +3.
• So, the primary valency of Fe is 3.
• The correct option is a.