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Here is the chemical reaction that represents solid lead chloride dissolving in water:

PbCl2(s) ⇌Pb2+(aq)+2Cl−(aq)

Ksp =1.2×10−5

Part A

Which of the following actions would shift this reaction toward solid lead chloride?

a. Add more lead chloride.
b. Add more chloride ions.
c.Remove chloride ions.
d. Remove lead ions.

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Answer:

B. Add more chloride ions

Explanation:

Because we know based on lechatlier that any disturbance to equilibrium will make the shift act accordingly. If something is removed it wants to shift to side where it is removed to compensate for the change, if something is added it wants to move away from it to minimize the change.

Therefore, if you add chloride ions, the equilibrium shifts to left to make more solid lead chloride.