Which of these 2 is insoluble in water: Ca(NO3)2 or PbSO4. I believe Anglesite is correct. pls confirm.?
Answer:
PbSO4 ( Anglesite) is a slightly soluble salt
Ksp = 1.6 x 10^-8
Molar solubility = 0.000126 M
Ca(NO3)2 dissolves in water >> Ca2+ + 2 NO3-
PbSO4 is insoluble in water.
For furthur information;
Soluble:-
Group I and NH4+ compounds
nitrates
acetates (ethanoates)
chlorides, bromides and iodides (except Ag+, Pb2+, Cu+ and Hg22+)
sulfates (except Ag+, Pb2+, Ba2+, Sr2+ and Ca2+)
Insoluble:-
carbonates (except Group I, NH4+ and uranyl compounds)
sulfites (except Group I and NH4+ compounds)
phosphates (except Group I and NH4+ compounds)
hydroxides and oxides (except Group I, NH4+, Ba2+, Sr2+ and Tl+)
sulfides (except Group I, Group II and NH4+ compounds)
By referencing any list of solubility rules you can see that ALL nitrates are soluble in water, knowing just that you can determine that PbSO4 is insoluble. Also, that list probably states that all sulfates are soluble except a few including PbSO4.
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