67, Holmium (Ho)
lat. holmia = Stockholm |
Säure-Base-Verhalten:
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Säure/Base-Verhalten der Holmium-Oxide: |
|
Reaktionen mit: |
HF 100% |
H2SO4 conc. |
HCl 20% |
CH3COOH 25% |
H2O |
NH3 25% |
NaOH 10% kalt |
NaOH 50% heiß |
NaOH liq. 400°C |
Ho2O3 |
HoF3↓ |
Ho2(SO4)3 |
HoCl3 |
(CH3COO)3Ho |
Ho(OH)3↓ |
Ho(OH)3↓ |
Ho(OH)3↓ |
NaHo(OH)4 |
Na3Ho(OH)6 |
|
Legende: |
Lösung |
|
Unlöslich |
|
sauer → neutral → alkalisch |
|
|
|
|
pKS-Werte von Säure-Base-Paaren (HA + H2O ↔ H3O+ + A-) : |
Säurename |
Formel |
pKS-Wert |
Basenname |
Formel |
pKB-Wert |
|
Holmium(III)-Ion |
Ho3+ |
7.90 |
Hydroxo-Holmium(III)-Ion |
Ho(OH)2+ |
6.1 |
Hydroxo-Holmium(III)-Ion |
Ho(OH)2+ |
8.20 |
Dihydroxo-Holmium(III)-Ion |
Ho(OH)2+ |
5.8 |
Dihydroxo-Holmium(III)-Ion |
Ho(OH)2+ |
8.40 |
Holmium(III)hydroxid |
Ho(OH)3 |
5.6 |
Holmium(III)hydroxid |
Ho(OH)3 |
8.90 |
Tetrahydroxo-Holmiat(III)-Ion |
Ho(OH)4- |
5.1 |
|