60, Neodym (Nd)
gr. neo = neu, didymos = Zwilling, neuer Zwilling |
Säure-Base-Verhalten:
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Säure/Base-Verhalten der Neodym-Oxide: |
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Reaktionen mit: |
HF 100% |
H2SO4 conc. |
HCl 20% |
CH3COOH 25% |
H2O |
NH3 25% |
NaOH 10% kalt |
NaOH 50% heiß |
NaOH liq. 400°C |
Nd2O3 |
NdF3↓ |
Nd2(SO4)3 |
NdCl3 |
(CH3COO)3Nd |
Nd(OH)3↓ |
Nd(OH)3↓ |
Nd(OH)3↓ |
NaNd(OH)4 |
Na3Nd(OH)6 |
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Legende: |
Lösung |
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Unlöslich |
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sauer → neutral → alkalisch |
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pKS-Werte von Säure-Base-Paaren (HA + H2O ↔ H3O+ + A-) : |
Säurename |
Formel |
pKS-Wert |
Basenname |
Formel |
pKB-Wert |
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Neodym(III)-Ion |
Nd3+ |
8.10 |
Hydroxo-Neodym(III)-Ion |
Nd(OH)2+ |
5.9 |
Hydroxo-Neodym(III)-Ion |
Nd(OH)2+ |
8.80 |
Dihydroxo-Neodym(III)-Ion |
Nd(OH)2+ |
5.2 |
Dihydroxo-Neodym(III)-Ion |
Nd(OH)2+ |
9.50 |
Neodym(III)hydroxid |
Nd(OH)3 |
4.5 |
Neodym(III)hydroxid |
Nd(OH)3 |
10.7 |
Tetrahydroxo-Neodymat(III)-Ion |
Nd(OH)4- |
3.3 |
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