I realize I am not supposed to post actual questions from the test. So I'm not. I understand why the right answer is what it is. But can someone please tell me why they say that PbCl2 forms an aqueous solution in the following reaction? PbCO3 + 2HCl --> PbCl2 (aq) + CO2 + H2O Aren't all the halogens soluble EXCEPT with heavy metals and Ag, Pb and Hg???? Shouldn't PbCl2 be a solid???? Please Help!