Question

Which of the following statements concerning the separation of metal ions into Analytical Groups I-V is/are correct?
1) Only the least soluble sulfides will precipitate in an acidic solution of H2S.
2) K+and Na+are precipitated in the last step of the separation scheme.
3) The formation of a precipitate with the addition of dilute HCl(aq) indicates the original solution contains all of the ions of Analytical Group I (the ions which precipitate as chlorides).
A) 1 only
B) 2 only
C) 3 only
D) 1 and 2
E) 1, 2, and 3

Answer

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