Preparation
Barium chloride can be prepared from barium hydroxide or barium carbonate, with barium carbonate being found naturally as the mineral witherite. These basic salts react with hydrochloric acid to give hydrated barium chloride. On an industrial scale, it is prepared via a two step process from barite (barium sulfate):
- BaSO4(aq) + 4 C(s) → BaS(s) + 4 CO(g)
This first step requires high temperatures.
- BaS + CaCl2 → BaCl2 + CaS
The second step requires fusion of the reactants. The BaCl2 can then be leached out from the mixture with water. From water solutions of barium chloride, the dihydrate can be crystallized as white crystals: BaCl2·2H2O
Read more about this topic: Barium Chloride
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