Englisch
Französisch
Kroatisch
Deutsch
Italienisch
|
||||||||||||||||||||||||
 |
|
|
||||||||||||||||||||||
|
||||||||||||||||||||||||
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | R | S | T | U | V | X | Z | ||
|
||||||||||||||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||||||||||||||||
| Arsenic | Arsenic | Arsen | Arsenico | Arsen | ||||||||||||||||||||
|
||||||||||||||||||||||||
|
As Arsenum |
|
||||||||||||||||||||||||||||||
- Arsenic was discovered by Albertus Magnus (Germany) in 1250. The origin of the name comes from the Greek word arsenikon meaning yellow orpiment. It is steel-grey, brittle semi-metal. Resists water, acids and alkalis. Tarnishes in air, burns in oxygen. Highly toxic by inhalation or ingestion.
|
|
|
|
STICKSTOFFGRUPPE | |
|
||
| Relative Atommasse: | 74.92160(2) | Elektronenkonfiguration: | [Ar] 3d10 4s2 4p3 |
| Oxidationszustände: | -3 +3 +5 | Elekronegativität: | 2.18 |
| Wärmeleitfähigkeit: | 50 W m-1 K-1 | Elektrische Widerstandskraft (20 °C): | 33.3 μΩcm |
| Atomradius: | 124.5 pm | Zustand (20 °C): | fest |
| Dichte (g dm-3): | 5780 (alpha, 293 K) 4700 (beta, 293 K) |
Atomvolumen (cm3 mol-1): | 12.96 (alpha, 293 K) 15.94 (beta, 293 K) |
|
|
|
|
THERMISCHE EIGENSCHAFTEN | |
|
||
| Schmelzpunkt: | 817 °C | Bildungsenergie: | 27.7 kJ mol-1 |
| Siedepunkt: | 614 °C | Verdampfungsenergie: | 31.9 kJ mol-1 |
| Kritische Temperatur: | 1827 °C | Zerstäubungsenergie: | 301.42 kJ mol-1 |
|
|
|
|
IONISIERUNGSENERGIE UND HÄUFIGKEIT | |
|
||
| 1. Ionisierungenergie: | 944.46 kJ mol-1 | Häufigkeit des Elements (Luft): | - ppm |
| 2. Ionisierungenergie: | 1797.82 kJ mol-1 | Häufigkeit des Elements (Erdkruste): | 1 ppm |
| 3. Ionisierungenergie: | 2735.48 kJ mol-1 | Häufigkeit des Elements (Ozean): | 0.003 ppm |
|
|
|
|
ISOTOPE | |
|
||
|
Isotope | Relative Atommasse | Häufigkeit (%) |
|
|
||
|
75As | 74.921596(2) | 100 |
|
|
|
|
MINERALIEN UND GEBRAUCH | |
|
||
- Arsenic is found in mispickel (arsenopyrite). Many of its compounds are deadly poison and used as weed killer and rat poison. Used in semiconductors. Some compounds, called arsenides, are used in the manufacture of paints, wallpapers and ceramics. The price of 99.5 % pure arsenic sponge is 322.60 € for 100 g.
|
|
|
|
REDUKTIONSPOTENTIALE | |
|
||
|
Balanced half-reaction | Eo / V | Anmerkung |
|
|
||
|
H3AsO4 + 3H+ + 2e-  AsO+ + 3H2O |
+0.55 | |
|
H3AsO4 + 2H+ + 2e- H3AsO3 + H2O |
+0.559 | |
|
H3AsO4 + 2H+ + 2e- H3AsO3 + H2O |
+0.577 | 1 mol dm-3 HCl |
|
H3AsO4 + 2H+ + 2e- H3AsO3 + H2O |
+0.577 | 1 mol dm-3 HClO4 |
|
H2AsO4- + 3H+ + 2e- H3AsO3 + H2O |
+0.666 | |
|
HAsO42- + 4H+ + 2e- H3AsO3 + H2O |
+0.881 | |
|
HAsO42- + 3H+ + 2e- H2AsO3- + H2O |
+0.609 | |
|
AsO43- + 3H2O + 2e- H2AsO3- + 4OH- |
- 0.67 | |
|
2H3AsO4 + 4H+ + 4e- As2O3(s) + 5H2O |
+0.58 | |
|
2H2AsO4- + 6H+ + 4e- As2O3(s) + 5H2O |
+0.687 | |
|
2HAsO42- + 8H+ + 4e- As2O3(s) + 5H2O |
+0.901 | |
|
2AsO43- + 10H+ + 4e- As2O3(s) + 5H2O |
+1.27 | |
|
AsO43- + 8H+ + 5e- As(s) + 4H2O |
+0.648 | |
|
As2O3(s) + 6H+ + 6e- 2As(s) + 3H2O |
+0.234 | |
|
AsO+ + 2H+ + 3e- As(s) + H2O |
+0.254 | |
|
H3AsO3 + 3H+ + 3e- As(s) + 3H2O |
+0.248 | |
|
H2AsO3- + 4H+ + 3e- As(s) + 3H2O |
+0.429 | |
|
H2AsO3- + H2O + 3e- As(s) + 4OH- |
- 0.68 | |
|
As(s) + 3H+ + 3e- AsH3(g) |
- 0.608 | |
