Platine
De Hack-it.org.
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| - | * | + | ==Ou le trouver== |
| + | * Sondes PH | ||
| + | |||
| + | Mais aussi : | ||
| + | * Cartes electroniques (ordinateurs, hi-tech...) | ||
| + | * Catalyseurs | ||
| + | * Bijoux (or blanc), médecine dentaire, équipements de labo, têtes de missiles nucléaires... | ||
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| + | ==Reconnaitre== | ||
| + | pour reconnaitre le platine, il est gris blanc couleur argent et ne se ternit jamais, tres malléable et elastique, il rougit vite mais ne devient pas noir au refoidissement et il ne s'oxyde jamais | ||
| + | a couleur du platine, sa solidité, sa dureté et sa résistance au ternissement sont parmi les nombreux avantages que compte ce produit. | ||
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| + | ==Propriétés== | ||
* Soluble dans l'eau régale | * Soluble dans l'eau régale | ||
* Il vaut bien plus cher que l'or | * Il vaut bien plus cher que l'or | ||
*This metal is insoluble in hydrochloric and nitric acid, but does dissolve in the mixture known as aqua regia (forming chloroplatinic acid). Common oxidation states of platinum include +2, and +4. The +1 and +3 oxidation states are less common, and are often stabilized by metal bonding in bimetallic (or polymetallic) species.The gold is removed from this solution as a precipitate by treatment with iron(II) chloride (FeCl2). The platinum is precipitated out as impure (NH4)2PtCl6 on treatment with NH4Cl, leaving H2PtCl4 in solution. | *This metal is insoluble in hydrochloric and nitric acid, but does dissolve in the mixture known as aqua regia (forming chloroplatinic acid). Common oxidation states of platinum include +2, and +4. The +1 and +3 oxidation states are less common, and are often stabilized by metal bonding in bimetallic (or polymetallic) species.The gold is removed from this solution as a precipitate by treatment with iron(II) chloride (FeCl2). The platinum is precipitated out as impure (NH4)2PtCl6 on treatment with NH4Cl, leaving H2PtCl4 in solution. | ||
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| + | ===Liens=== | ||
| + | Histoire sur l'utilisation du platine http://unctad.org/infocomm/francais/platine/utilisat.htm#Verre | ||
