State one reagent that can be used to distinguish btwn each of the pairs of ions and in each case state what is observed if each ion is treated with the named reagent.a)Pb2+(aq) and Al3+ b)SO4 2- and SO3 2-

Answer 1

a. Add HCl. Pb^2+ + 2Cl^- ==> PbCl2(white ppt). No rxn with Al^3+
b. Add conc'd HCl. sulfate no rxn. sulfite will get SO2 fumes given off
OR
add BaCl2. sulfate gives white ppt of BaSO4. sulfite gives white ppt of BaSO3. Then add dilute HCl. BaSO3 dissolves. BaSO4 does not.