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Dolomite can also be treated to get MgCl...

Dolomite can also be treated to get `MgCl_(2)` which in turn is electrolysed to get `Mg` (Dow natural brine process) . Give reactions for this process.

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`{:(MgCO_(3).CaCO_(3),underset(Delta)rarr,MgO + CaO + 2CO_(2) uarr),(,," "darr HCI darr),(MgCl_(2)+CaCO_(3) darr,overset(CO_(2))rarr,MgCI_(2) + CaCI_(2)):}`
On passing `CO_(2)` into aq. `MgCI_(2) and CaCI_(2)` solution, `CaCO_(3)` is precipitated leaving `MgCI_(2)` soluble.
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