Each of the insoluble salts below are put into 0.10 M hydrobromic acid solution. Do you expect their solubility to be more, less, or about the same as in a pure water solution?
--> PbBr2 --> Pb+2 + 2Br-
since HBr is added, ther eis shift in equilbiirum, Br- is present as common ion, therefore PbBr2(s) increases, solubility decreases
FeS = Fe+2 + S-2
S-2 + H+ = HS-
thjen, there is shift towards even more S-2 production, so FeS(s) must go into solution
AgI <-> Ag+ + I-
presence of HBr- will precipitate Ag + Br- = AgBr
therefore, AgI will go to soluble Ag+ + I- to counterbalance the difference
AgI increases in solubility
BaF2 = Ba+2 + 2F-
addition of H+ increases:
F-+ H+ = HF
therefore, shift goes from solid BaF2 to ionic Ba+2, 2F- , this increases solubility
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