Dow's process f extraction of Mg involves extraction of Mg from sea water. Sea water is concentrated issun light and is then treated with milk of lime. Magnesium hydroxide obatained is reactedwith dilute HCl and MgCl_(2) thus obtained is crystallised. The molten mixture containing angydrous 35% MgCl_(2), 50% NaCl and 15%CaCl_(2) is electrolysed when magnesium is discharged at cathode. NaCl and CaC_(2) are added to lower the fusion temperature and to increase to the conductance. Mg electrolysed is protected from atmospheric oxidation by a blanket of inert gases. Molten mixture of NaCl and CaCl_(2) is added to hte molten MgCl_(2) beacuse:

Dow's process f extraction of Mg involves extraction of Mg from sea wa

1.	Dow's process f extraction of Mg involves extraction of Mg from sea water. Sea water is concentrated issun light and is then treated with milk of lime. Magnesium hydroxide obatained is reactedwith dilute HCl and MgCl_(2) thus obtained is crystallised. The molten mixture containing angydrous 35% MgCl_(2), 50% NaCl and 15%CaCl_(2) is electrolysed when magnesium is discharged at cathode. NaCl and CaC_(2) are added to lower the fusion temperature and to increase to the conductance. Mg electrolysed is protected from atmospheric oxidation by a blanket of inert gases. Molten mixture of NaCl and CaCl_(2) is added to hte molten MgCl_(2) beacuse:
Answer» it increase the melting POINT of `MgCl_(2)`. `CaCl_(2)` ACTS as a dehydrating agent. `CaCl+NaCl` lower the melting point of `MgCl_(2)`. NONE of these Answer :C