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Give briefly the isolation of magnesium from sea water by the Dow process. Give equations for the steps involved.

Give  briefly the isolation of magnesium from sea water by the Dow process. Give equations for the steps involved.

Grade:10

1 Answers

Jitender Pal
askIITians Faculty 365 Points
9 years ago
In sea water Mg exists as MgCI2.
On treating sea water wit slaked lime Mg(OH)2 is obtained.
MgCI2 + Ca(OH)2 → Mg(OH)2↓ + CaCI2
In sea water slaked lime
On reacting Mg(OH)2­ with HCI, MgCI2 is obtained.
Mg(OH)2 + 2HCI → MgCI2 + H2O
From MgCI2, Mg is obtained by reduction of MgCI2 with CaCI2.
MgCI2 + CaC2 → Mg + CaCI2 + 2C

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