Question

Give Up? Resources Hint Check Answer Question 28 of 32> Find the concentration of Hgt in 0.10 M Kl saturated with Hg,I,. Include activity coefficients in your soluhility-product expression. The Kg of Hg, I, is 4.6 x 10-9 Hg*1= м help contact ems of use arivacy palicy careen MacBook Pro F DD Dil

Answer 1

The dissociation of KI is as follows:

KCL <==> K⁺ + I^-

0.10 M 0.10 M 0.10M

so calculate the ionic strength as follows:

μ (ionic strength) = 1/2 * (c₁Z₁² + c₂Z₂²)

  = 1/2 * (0.10 (+1)² + 0.10 (-1)²  )

= 0.10 M

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calculate the concentration of Hg⁺² as follows :

K_sp = [Hg⁺²] (γ_Hg⁺²) [I^-]² [γ_I^-]²

4.6 X 10^-29 =(S) (0.867) (0.001 + 2S)² (0.964)²

on solving best solution for S

S= 5.7 X 10^-23 M (ignore other answers )

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