Question

A complex containing K+, Pt(IV) and Cl¯ is 100% ionised giving i = 3.Thus, complex is :

(A) K2[PtCl4]

(B) K2[PtCl6]

(C) K3[PtCl5]

(D) K[PtCl3]

Answer 1

Correct Answer is: (B) K2[PtCl6]

i = van’t Hoff factor = 1 + (y – 1) x

(y= number of ions, x = degree of ionisation)

In (a) oxidation number of Pt = 2 ;

In (b) oxidation number of Pt = 4