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prof.Goran Poš

DRUGA GRUPA KATJONA. prof.Goran Poš. Odvajanje i dokazivanje katjona I I analiti čke grupe. Reakcije dokazivanja I I analitičke grupe. Hg 2+ + H 2 S → H g S + 2 H +. Hg 2+ + 2 I - → H g I 2. (rastvoran u višku I - ). Hg 2+ + Sn 2+ + 2 Cl - → H g 2 Cl 2 + Sn 4+.

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prof.Goran Poš

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  1. DRUGA GRUPA KATJONA prof.Goran Poš

  2. Odvajanje i dokazivanje katjona II analitičke grupe

  3. Reakcije dokazivanja II analitičke grupe Hg2+ +H2S→ HgS + 2H+ Hg2+ +2I-→ HgI2 (rastvoran u višku I-) Hg2+ + Sn2+ + 2Cl- → Hg2Cl2 + Sn4+ Pb2+ +H2S→ PbS + 2H+ svilenkast Cu2+ +H2S→ CuS + 2H+ Cu2+ +4NH4OH→[Cu(NH3)4]2+ + 4H2O 2Bi3+ +3H2S→ Bi2S3+ 6H+ 2Bi3+ +3Na2[Sn(OH)4] + 6OH-→ →2Bi + 3Na2[Sn(OH)6] Cd2+ +H2S→ CdS + 2H+

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