Question

How is calcium extracted through electrometallurgy? Give the reactions involved.

Answer 1

It is extracted by the electrolysis of its molten salt (fused calcium chloride, CaCl₂).

Reaction at Cathode:

\[\ce{Ca^{2+} + 2e- -> Ca}\]

Reaction at Anode:

\[\ce{2Cl^- -> Cl2 + 2e-}\]