Question

How is magnesium extracted from seawater? (With reference to precipitation reactions)

Answer 1

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▶Insoluble salts can be made by precipitation reactions. In this method, solutions of two soluble compounds are mixed, and an insoluble salt forms along with a soluble product.

▶In the US, 63% of magnesium production came from seawater and brines during 2015. The metal is extracted from seawater and brines by means of electrolysis, a process that requires the passing of a current through a molten salt. This extracts the metal from the salt, but requires a high temperature to melt the salt.