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Au

Aurum
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Gold has been known since ancient times. The origin of the name comes from the Latin word aurum meaning gold. It is soft, malleable, bright yellow metal. Unaffected by air, water, alkalis and most acids.
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METALLI DI TRANSIZIONE: RAME GRUPPO |
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ENERGIE DI IONIZZAZIONE ED ABBONDANZA |
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Isotopo |
Massa atomica relativa |
Abbondanza (%) |
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197Au | 196.966552(3) | 100 |
Gold is found in veins in the crust, with copper ore and native. Used in electronics,jewellery and coins. It is a good reflector of infrared radiation, so a thin film of gold is applied to the glass of skyscrapers to reduce internal heating from sunlight. The price of 99.99 % pure gold grain is 1652.50 € for 25 g.
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POTENZIALI DI RIDUZIONE STANDARD |
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Semi-Reazione |
Eo / V |
Annotazione |
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Au3+ + 2e- Au+ |
+1.41 |
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Au3+ + 3e- Au(s) |
+1.50 |
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Au+ + e- Au(s) |
+1.68 |
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AuCl4- + 2e- AuCl2- + 2Cl- |
+0.926 |
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AuBr4- + 2e- AuBr2- + 2Br- |
+0.805 |
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AuCl4- + 3e- Au(s) + 4Cl- |
+1.002 |
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AuBr4- + 3e- Au(s) + 4Br- |
+0.858 |
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AuCl2- + e- Au(s) + 2Cl- |
+1.154 |
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AuBr2- + e- Au(s) + 2Br- |
+0.963 |
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