Noble Elements dissolved by Aqua Regis

Califox | 14:57 Sat 21st Oct 2006 | Science

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Which Noble elements can be dissolved by Aqua Regis? I know gold, but not sure what else!

Conductor of Electricity

Element Name

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theprof

There are a whole host of elements that have formely been known as Noble Metals by chemists. These include mercury and even copper.

One definitive source of the modern list is provided in "Corrosion" 3rd edition by Shrier, Jarman and Burstein. These are:

Platinum
Iridium
Osmium
Palladium
Rhodium
Ruthenium
Silver
Gold

Platinum, Palladium and Gold are soluble in Aqua Regia.
Osmium is slightly soluble. Rhodium is slightly soluble as a powder but not usually as a mass. Ruthenium is insoluble. Iridium is insoluble. Silver is usually regarded as insoluble as it precipitates out as the chloride.

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