☰
✕

Equilibrium
Question
Wired Faculty App

HgCl2 and I2 both when dissolved in water containing I– ions the pair of species formed is

  • HgI2 , I3-

  • Hgl2, I-

  • HgI43-, I3-

  • Hg2I2, I-

Answer

C.

HgI43-, I3-

In a solution containing HgCl2, I2 and I–, both HgCl2 and I2
compete for I–.
Since formation constant of [HgI4]2– is 1.9 × 1030
which is very large as compared with I3– (Kf= 700)
therefore, I– will preferentially combine with HgCl2
HgCl2 + 2l- → Hgl2↓ + 2Cl-
Hgl2 + 2l- → [Hgl4]2-

Sponsor Area

Some More Questions From Equilibrium Chapter

Which measurable property becomes constant in water vapour equilibrium?

Give an example from daily life in which there is gas solution equilibrium?

A crystal of common salt of a given mass is kept in its aqueous solution. After 24 hours, its mass remains the same. Is the crystal in equilibrium with the solution?

What is the role of forward and backward reactions at equilibrium of a reversible reaction?

What is a forward reaction?

What condition favours a reversible reaction?