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MgCl(2).6H(2)O on heating gives anhydrou...

`MgCl_(2).6H_(2)O` on heating gives anhydrous `MgCl_(2)`.

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The correct Answer is:
F
On heating `MgCl_(2).6H_(2)O` undergoes particle hydrolysis.

Anhydrous `MgCl_(2)` is obtained by heating the hydrated salt with dry `HCl`.
`MgCl_(2).6H_(2)Ooverset(Dry HCl)(rarr)MgCl_(2)+6H_(2)O`
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Anhydrous MgCl_(2) is obatined by heating hydrate salt, MgCl_(2).6H_(2)O .

Dow's process of extraction of Mg involves extraction of Mg from sea water. Sea water is concentrated in sun-light and is then treated with slaked lime. Magnesium hydroxide is heated in a stream of HCl to give MgCl_(2) which is electrolysed to discharge Mg. The mixture is in the ratio 35% MgCl_(2)+50% NaCl+15% CaCl_(2) . NaCl and CaCl_(2) are added to lower the fusion temperature and to increases the conductance. Mg^(2+) +Ca(OH)_(2) to Mg(OH)_(2)+Ca^(2+) Mg(OH)_(2)+2HCl to MgCl_(2)+2H_(2)O(l) Electrolysis of fused MgCl_(2) hArr Mg^(2+)+2Cl Mg^(2+)+2e^(-) to Mg ( At Cathode) 2Cl^(-) to Cl_(2)+2e^(-) (At Anode) Mg electrolysed is protected from atmospheric oxidation by a blanket of inert gases. In the hydrated chloride of Mg the value of x is :

When MgCl_(2).6H_(2)O is strongly heated, then if forms :

Knowledge Check

  • MgCl_(2).6H_(2)O when heated gives

    A
    Magnesium oxychloride
    B
    Magnesium dichloride
    C
    Magnesium oxide
    D
    Magnesium chloride

  • MgCl_(2). 6H_(2)O , when heated gives-

    A
    magnesium hydride
    B
    magnesium chloride
    C
    magnesium oxide
    D
    magnesium oxychloride

  • KCl.MgCl_2. 6H_2O is a

    A
    mixed salt
    B
    double salt
    C
    basic salt
    D
    complex salt
    • CENGAGE CHEMISTRY-S-BLOCK GROUP 2 - ALKALINE EARTH METALS-Exercises Archives True/Flase
    1. MgCl(2).6H(2)O on heating gives anhydrous MgCl(2).

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