In which of the following pairs of ionic compounds are both members of the pair soluble in water?

a.AgNO3 and AgCl
b.LiOH and Li2SO4
c.PbSO4 and BaCO3
d.NH4I and Sn3(PO4)2

1 answer

You need to know the solubility rules. Here is a simplified set. I shall be happy to check your answer.
http://www.csudh.edu/oliver/chemdata/solrules.htm