Question

HgCl2 and I2 both when dissolved in water containing I ions
the pair of species formed is : [2017]
(a) HgI₂, I⁻ (b) HgI₄²⁻ , I₃⁻
(c) Hg₂I₂, I⁻ (d) HgI₂ , I₃⁻

Answer 1

The pair of species formed is  HgI4^-2 + 2 Cl-

Option (D) is correct.

Explanation:

HgCl 2  and I 2  both when dissolved in water containing I −  ions the pair of species formed is  HgI4^2-, I3^-

I2 +  I- -----> I3 −

HgCl2  + 4I- -----> HgI4^-2 + 2 Cl-

Thus the pair of species formed is  HgI4^-2 + 2 Cl-

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