Question

How is the method of extraction of metal high up in the reactivity series different from that for metals in the middle? Why the same process can't be applied for them ? Explain giving equations the extraction of sodium?

Answer 1

Dear student,

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<sup>-


i hope you understood now</sup>