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Determine the value of the equilibrium constant (report
youranswer to three significant figures) for the following reaction
ifan equilibrium mixture contains 0.010 mol of solid
PbI2,and is 0.0100 M in Pb2+ ions and 0.00081
M inI1- ions. Use the notation 4.31e-5 to indicate a
numbersuch as 4.31 x 10-5.

Respuesta :

anfabba15

Answer:

Kps = 6.56eā»ā¹

Explanation:

This is a solubility equilibrium

PbIā‚‚ Ā (s) Ā ā‡„ Ā PbĀ²āŗ Ā + Ā 2Iā»

Expression for Kc will be:

[Iā»]Ā² Ā . [PbĀ²āŗ] / [PbIā‚‚]

But we do not have to consider the solid. It does not have a physical sense. Ā Amount of solid without dissolving, doesn't affect the ions concentrations.

We talk about Kps (Constant for solubility product)

Kps = [Iā»]Ā² Ā . [PbĀ²āŗ]

Kps = (0.00081)Ā² Ā . Ā 0.01 ā†’ 6.56x10ā»ā¹

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