| Reactions of Gold |
 Reactions with water |
| Gold does not react with water, under any circumstances. |
| Reactions with air |
| Under normal conditions gold will not react with air. |
| Reactions with halogens |
| Gold reacts with chlorine and bromine to form trihalides and with iodine to form a monohalide.
|
2Au(s) + 3Cl2(g) 2AuCl3(s) |
| 2Au(s) + 3Br2(g)2AuBr3(s) |
| 2Au(s) + I2(g)2AuI(s) |
| Reactions with acids |
| Gold can be dissolved with a mixture of hydrochloric acid (HCl) and concentrated nitric acid (HNO3), in a ration of 3:1. This combination is known as aqua regia, "royal water".
|
| Reactions with bases |
| Gold will not react with aqueous bases. |
Au+