52, Tellur (Te)
lat. tellus = Erde |
Säure-Base-Verhalten:
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Säure/Base-Verhalten der Tellur-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 |
TeO2 |
TeO2↓ |
TeO2↓ |
TeCl4 |
H2TeO3 |
H2TeO3 |
(NH4HTeO3 |
Na2TeO3 |
Na2TeO3 |
Na2TeO3 |
TeO3 |
H6TeO6 |
H6TeO6 |
H6TeO6 |
H6TeO6 |
H6TeO6 |
NH4H5TeO6 |
NaH5TeO6 |
Na2H4TeO6 |
Na6TeO6 |
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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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Tellurwasserstoffsäure |
H2Te |
2.64 |
Hydrogentellurid-Ion |
HTe- |
11.36 |
Hydrogentellurid-Ion |
HTe- |
10.69 |
Tellurid-Ion |
Te2- |
3.31 |
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Tellurige Säure |
H2TeO3 |
2.7 |
Hydrogentellurid-Ion |
HTeO3- |
11.3 |
Hydrogentellurid-Ion |
HTeO3- |
8 |
Tellurit-Ion |
SeO32- |
6 |
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Orthotellursäure |
H6TeO6 |
7.7 |
Pentahydrogenorthotellurat-Ion |
H5TeO6- |
6.3 |
Pentahydrogenorthotellurat-Ion |
H5TeO6- |
10.95 |
Tetrahydrogenorthotellurat-Ion |
H4TeO62- |
3.05 |
Tetrahydrogenorthotellurat-Ion |
H4TeO62- |
14.25 |
Trihydrogenorthotellurat-Ion |
H3TeO63- |
-0.25 |
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