Print Calustor Perodke Table 17 Mapo\'b Ansv A sclution containing a miture of m

Question

Print Calustor Perodke Table 17 Mapo'b Ansv A sclution containing a miture of metal cations was treated with dilute HCI and no precipitate formed Next, HS was bubbled through the ackdic solution. A precipitate formed and was fitered off. Then, he ph was raised to about 8 and HS was again bubbled through the solution. A precipitatn again fomed and was filtered off. Finaly, the solution was treated with a sodium carbonate solution, which resulted in no predpitation Which metal ions were definilely present, which were defiritely absent, and which may or may not have boen present in the onginal mature? Definitely present Definitely Possilbly present A solution co as follows.7 Tab s Lock

Explanation / Answer

Definetely present: -

Definetely absent: Ag+, Pb2+, Hg22+ (no pp. with HCl), Ca2+ (no pp.with CO32-)

Possibly present: all other (pp. with H2S in acidic and basic media or remaining in the final solution , e.g.,Li+, Mg2+ )

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