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of the following describes what happens to the solubility of PbCl_2 when placed

ID: 504114 • Letter: O

Question

of the following describes what happens to the solubility of PbCl_2 when placed into a 0.50 NaCl solution? A. Solubility decreases because the chloride ions from the sodium chloride push the equilibrium toward the solid. B. Solubility increases because the presence of the sodium ions in solution pushes the equilibrium toward the solid. C. Solubility decreases because the presence of the sodium ions in solution reduces the solubility of the lead chloride. D. Solubility increases because the presence of the additional ions increases the ionic strength.

Explanation / Answer

PbCl2 <-> PB+2 + 2Cl-

this will form an equilbirium

if we add NaCl --> Na+ + Cl- is present

Cl- will shift the equilibrium toward more PbCl2(s) production

which is solid, so the solubility DECREASES

choose A