# Problem: The Hg2+ ion forms complex ions with I - as follows:Hg2+(aq) + I -(aq) ⇌ HgI+(aq)            K 1 = 1.0 X 108HgI+(aq) + I -(aq) ⇌ HgI2(aq)            K 2 = 1.0 X 105HgI2(aq) + I -(aq) ⇌ HgI3-(aq)           K 3 = 1.0 X 109HgI3-(aq) + I -(aq) ⇌ HgI42-(aq)         K 4 = 1.0 X 108A solution is prepared by dissolving 0.088 mole of Hg(NO3)2 and 5.00 moles of NaI in enough water to make 1.0 L of solution.c. Calculate the equilibrium concentration of [Hg2+].

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###### Problem Details

The Hg2+ ion forms complex ions with I - as follows:

Hg2+(aq) + I -(aq) ⇌ HgI+(aq)            K = 1.0 X 108
HgI+(aq) + I -(aq) ⇌ HgI2(aq)            K 2 = 1.0 X 105
HgI2(aq) + I -(aq) ⇌ HgI3-(aq)           K 3 = 1.0 X 109
HgI3-(aq) + I -(aq) ⇌ HgI42-(aq)         K 4 = 1.0 X 108

A solution is prepared by dissolving 0.088 mole of Hg(NO3)2 and 5.00 moles of NaI in enough water to make 1.0 L of solution.

c. Calculate the equilibrium concentration of [Hg2+].