62, Samarium (Sm)
Mineral Samarskit |
Säure-Base-Verhalten:
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Säure/Base-Verhalten der Samarium-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 |
Sm2O3 |
SmF3↓ |
Sm2(SO4)3 |
SmCl3 |
(CH3COO)3Sm |
Sm(OH)3↓ |
Sm(OH)3↓ |
Sm(OH)3↓ |
Sm(OH)3↓ |
Na3Sm(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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Samarium(III)-Ion |
Sm3+ |
7.90 |
Hydroxo-Samarium(III)-Ion |
Sm(OH)2+ |
6.1 |
Hydroxo-Samarium(III)-Ion |
Sm(OH)2+ |
8.60 |
Dihydroxo-Samarium(III)-Ion |
Sm(OH)2+ |
5.4 |
Dihydroxo-Samarium(III)-Ion |
Sm(OH)2+ |
9.40 |
Samarium(III)hydroxid |
Sm(OH)3 |
4.6 |
Samarium(III)hydroxid |
Sm(OH)3 |
11 |
Tetrahydroxosamarat(III)-Ion |
Sm(OH)4- |
3 |
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