Copper Ore and Brass

Copper occurs both in the native form and in the combined state. The common ores 

Cuprite (red) Malachite (green) Azurite (blue) Copper glance (e) Copper pyrite.s 

In addition to iron, metals like As, Sb, Zn, Ni, etc., bitumen and silica may be present as impurities. 

About 1 g of the finely grinded copper ore is taken in a beaker and warmed with 15-20 ml of concentrated HNO3 until the copper passes into solution. It is then 

When an excess of KI is added to a solution contaming Cu in neutral or slightly acidic medium, quantitative liberation of iodine takes place  

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