Identifikasi kation golongan 5

Posted: Mei 24, 2012 in Analist

Tabulasi kation golongan V
literatur: Vogel- analisis kualitatif anorganik

Pereaksi Mg2+ K+ Na3+ NH4+
NH3
+H2O
Putih gelatin  ↓Mg(OH)2Sedikit larut
NaOH
+berlebih
Putih ↓Mg(OH)2
endapan tidak larut
Gas amonia
(NH4)2CO3
+H+
Putih↓4MgCO3Mg(OH)25H2O
Endapan larut
Na2HPO4
+H2O
Kristalin putih↓Mg(NH4)PO4
Sedikit larut
NaCO3+H+ Kristalin putih ↓4MgCO3Mg(OH)25H2O
Endapan larut
H2C4H4O6
+H2O
Kristalin putih↓KHC4H4O6
Sedikit larut
HClO4
+H2O
Kristalin putih ↓KClO4
Sedikit larut
Tidak ada  ↓
Mg(UO2)3(CHOO)9 Kristalin putih ↓NaMg(UO2)3 (CH3OOO)9
Zn(UO2)3(CHOO)9 Kristalin putih ↓NaZn(UO2)3 (CH3OOO)9
Nessler ↓coklat/ warna coklat/ kuning

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