Map Sapling Learning macmillan learning A Solution Containing a mixture of metal cations was treated as follows 1. Dilute HCl was added and a precipitate formed. The precipitate was filtered off 2. H2S was bubbled through the acidic solution. Again, a precipitate formed and was filtered off 3. The pH was raised to about 9 and H2S was again bubbled through the solution. No precipitate formed 4. Finally, sodium carbonate was added. A precipitate formed and was filtered off What can be said about the presence of each of these groups of cations in the original solution? Cation Group Present in the original solution? Description form insoluble chlorides Ag+, Pb2+, Hg22+ Bi3+, cd2+, Cu2+, Hg2 form acid-insoluble Pb2+, Sb3+, sn? Sn4+ A13+, Co2+, cr3+, E 2+ form base-insoluble Fe3+, Ni2+, Mn2+, zn2+ sulfides or hydroxides Ba2+, Ca2+, Mg2 sr2+ form insoluble carbonates completely soluble Lit, Nat, K+, NH4+ At least one of these ions was present unknown None of these ions were present. All of these ions were present
