In a qualitative cation analysis,the unknown ion is unaffected by HCl(aq),but is precipitated by aqueous hydrogen sulfide.The unknown ion is ________. A)NH₄⁺ B)Cu²⁺ C)Ag⁺ D)K⁺ E)Na⁺

Question

Quizplus · Accepted Answer

In qualitative cation analysis, ions that are precipitated by aqueous hydrogen sulfide in the presence of hydrochloric acid belong to the second analytical group of cations. Copper (Cu^2+) is a classic example of such an ion, as it forms a precipitate with H2S in acidic conditions, unlike the ions that are unaffected or form soluble compounds under these conditions.

In a Qualitative Cation Analysis,the Unknown Ion Is Unaffected by HCl(aq),but