Each of the insolude salts below are put into 0.10 M hydrobromic acid solution.

Question

Each of the insolude 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 pure water solution? *ive attempted the last three but not sure if I’m correct or not 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 ? Clear All calcium sulfide More soluble than in pure water lead iodide Similar solubility as in pure water silver bromide Less soluble than in pure water calcium luoride

Explanation / Answer

0.1 M of HBr

HBr increases H+ concentration, decreases pH

knowing this

CaS --> Ca+2 + S-2

S-2 + H+ --> HS-

therefore, this is more solulbe in acidic media

b)

PbI2 <-> Pb+2 + 2I-

no effect

similar solubility

c)

AgBr --> Ag+ + Br-

Br- ions are present from HBR, therefore this will

decrease solubility, increase AgBr in solution

d)

CaF2 <-> Ca+2 + F-2

F-+ H+ <-> HF

this favours oslubility

increases since it is acidic

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