How is the method of extraction of metals high up in the reactivity series different from that for
metals in the middle? Why the same process cannot be applied for them? Explain giving
equations, the extraction of sodium
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Metals high up in reactivity series are extracted by electrolytic reduction.
While those in the middle are extracted first by converting into oxide and then reducing by carbon. 1 Same method cannot be used because metals have more affinity for oxygen than carbon.
Molten sodium chloride is taken for electrolytic reduction. The metals are deposited at the cathode
and chlorine is liberated at anode.
At cathode : Na+ + e- → Na
At anode : 2Cl- → Cl2 + 2e-
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