Assume that you know the K sp of the following compounds: Hg 2 Cl 2 , PbBr 2 , H
ID: 509602 • Letter: A
Question
Assume that you know the Ksp of the following compounds: Hg2Cl2, PbBr2, HgI2, AgBr, CuCl, CaF2, PbSO4, PbF2, Ag2CO3, Fe(OH)3 and Cu(OH)2.
Choose the best choice(s) to characterize the relationship of Ksp values and the predicted relative solubilities of these compounds.
(a) Choose the group(s) wherein Ksp values provide direct information about the relative solubilities of the compounds:
a)
b)
c)
d)
e)
(b) Which compound has solubility which cannot be compared to any of the other ten compounds in this question based on Ksp values?
a)
b)
c)
d)
a)
Hg2Cl2, PbBr2, CaF2, PbF2, Cu(OH)2, Ag2CO3, HgI2Explanation / Answer
Hg2Cl2, PbBr2, HgI2, AgBr, CuCl, CaF2, PbSO4, PbF2, Ag2CO3, Fe(OH)3 and Cu(OH)2
Note that we need groups similar to:
AB, A2B or AB2,
AB grouping = AgBr. CuCl. PbSO4
A2B or AB2 grouping = Hg2Cl2, HgI2. CaF2. PbF2. Ag2CO3. Cu(OH)2
AB3 or A3B groups = Fe(OH)3
B)
which compound cannot be compared with any of the list,
the AB3 group, which is Fe(OH)3