on 20 of 23 Sapling Learning A solution containing a miture of metal cations was

Question

on 20 of 23 Sapling Learning A solution containing a miture of metal cations was treated with dilute HCI and no preclpltate formed. Next, H2S was bubbled through the ackdic solution. A precipitate formed and was fitered off. Then, the pH was raised to about 8 and H S was again bubbled through the solution. A precipitate again formed and was filtered off Finaly, the solution was treated with a sodium carbonate solution, which resulted in no precipitation. Which metal ions were definitely present, which were definitely absent, and which may or may not have been present in the original mbxture? Definicely present Definitely absent Possibly present ???. Incorrect O Previous Give Up & View Solution Try Again O Next DOLL

Explanation / Answer

Definitely present                         definitely absent                       possibly present
Pb^2+, Cu^2+, Hg^2+,Bi^3+,          Ag^+, Hg2^2+                          K^+
Sn^4+,Zn^2+ ,Ni^2+,Co^2+,
Mg^2+,Ca^2+

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