31, Gallium (Ga)
lat. gallia = Gallien, Frankreich |
Säure-Base-Verhalten:
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Säure/Base-Verhalten der Gallium-Oxide: |
|
Reaktionen mit: |
HF 100% |
H2SO4 conc. |
HCl 20% |
CH3COOH 25% |
H2O |
NH3 25% |
NaOH 10% kalt |
NaOH 50% heiß |
NaOH liq. 400°C |
[1]Ga2O3 |
GaF3↓ |
Ga2(SO4)3 |
GaCl3(aq) |
(CH3COO)2Ga(OH) |
Ga(OH)3↓ |
NH4Ga(OH)4 |
NaGa(OH)4 |
NaGa(OH)4 |
NaGaO2 |
|
Legende: |
Lösung |
|
Unlöslich |
|
sauer → neutral → alkalisch |
|
|
|
|
pKS-Werte von Säure-Base-Paaren (HA + H2O ↔ H3O+ + A-) : |
Säurename |
Formel |
pKS-Wert |
Basenname |
Formel |
pKB-Wert |
|
Gallium-Ion |
Ga3+ |
2.92 |
Hydroxo-Gallium-Ion |
Ga(OH)2+ |
11.08 |
Hydroxo-Gallium-Ion |
Ga(OH)2+ |
3.77 |
Dihydroxo-Gallium-Ion |
Ga(OH)2+ |
10.23 |
Dihydroxo-Gallium-Ion |
Ga(OH)2+ |
4.75 |
Galliumhydroxid |
Ga(OH)3 |
9.25 |
Galliumhydroxid |
Ga(OH)3 |
6.3 |
Tetrahydroxo-Gallat-Ion |
Ga(OH)4- |
7.7 |
|
|