Question

a)Name two cations whose salts are quite soluble in water?
b)Name one anion whose salts are soluble in water.?

Answer 1

Refer to this table.
http://www.files.chem.vt.edu/RVGS/ACT/notes/solubility_rules.html

I would choose Na and NH4 for the cations and nitrate for the anion.