Definition
The processes are different on the basis of reactivity of the metal. The higher the reactivity, the harder it is to separate the metal
Extraction
Metals of low reactivity
- Usually found in Sulphide Ore.
- Heated in excess air (Roasting) to form metal oxide.
- This metal oxide is then reduced and refined.
Metals of Medium Reactivity
- Found in both Sulphide and Carbonate Ores.
- Sulphide Ores → Roasting
- Carbonate Ores are heated in limited air to form metal oxides.
Metals of High Reactivity
- These are acquired by the electrolysis of the metal’s molten chlorides.
- The metal deposits in Cathode and chlorine is liberated in the anode.
Refining
The obtained metals are often impure. Those are refined using electrolysis.
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Flashcards
Extraction of ores in each reactivity ? Metals of low reactivity
- Usually found in Sulphide Ore.
- Heated in excess air (Roasting) to form metal oxide.
- This metal oxide is then reduced and refined. Metals of Medium Reactivity
- Found in both Sulphide and Carbonate Ores.
- Sulphide Ores → Roasting
- Carbonate Ores are heated in limited air to form metal oxides. Metals of High Reactivity
- These are acquired by the electrolysis of the metal’s molten chlorides.
- The metal deposits in Cathode and chlorine is liberated in the anode.