Question:

A change in pH will significantly affect the solubility of which, if any, of the following compounds?

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a. BaF2

b. CuCl

c. CuBr

d. AgI

e. None of the solubilities will be significantly affected.

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  1. BaF2 --> Ba & 2F-

    increasing the H+ ion concentration will allow H+ to take out the Fluorides in solution, forming the weak acid HF (Ka = 6.8e-4)

    the BaF2 will go into solution to replace the lost F-'s

    your answer is : a. BaF2  

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