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Sodium metal is made by the electrolysis...

Sodium metal is made by the electrolysis of a molten mixture of about `40% NaCI and 67% CaCI_(2)` in a

A

mercury cathode cell

B

solvay cell

C

downs cell

D

Diaphragm cell

Text Solution

Verified by Experts

The correct Answer is:
c
The silvery metal is manductured by the down process in which `NaCI (mp 801^(@)C)` is electrolyred in the motels state .The electroysis is done in a cylinderical cell with a center graphite mode and a surrunding steel cethod A mixture of `CaCI_(2) and NaCI` is used to reduce the cell needed to be opented .Although `CaCI` usefull has a melting point of `772^(@)C` a mixture of ` `53% ,NaCI and 67% CaCI_(2)` has a melting point of about `580^(@)C` it is the lower melting point of the mixyture that makes the process commecially posible
The two electrodes eare sepenrated is cylinder steel gances that makes the process commericially resible
tHe two electrodes ore separand by a cylinder steel gance diaphrages, so that the mothem will be kept away gaseress cherine formed or the anode
`Na(NaCI) + e rarr NaO)`
`2CI(NaCI) rarr CI_(2) (g) + 2e`
The Na metals produces constain about `0.2 % Ca` metal caoting the metel mixture is `100^(@)C` allow the ca impurity` (mp W^(@)C` so remain liquid and sink into the melt .The pure Na ` (mp 98^(@)C)` remain liquid and can be pamped into coolar moulds , where it sulafites .
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Knowledge Check

  • Sodium is made by the electrolysis of a molten mixture of about 40% NaCl and 60% CaCl_(2) because

    A
    `CaCl_(2)` helps in conduction of electricity
    B
    This mixture has a lower melting point than NaCl.
    C
    `Ca^(+)+` can displace Na from NaCl
    D
    `Ca^(+) +` can reduce NaCl to Na.

  • Sodium is made by the electrolysis of a molten mixture of about 40% NaCl and 60% CaCl_(2) because

    A
    `CaCl_(2)` helps in conduction of electricity
    B
    this mixture has a lower melting point that NaCl
    C
    `Ca^(2+)` can displace Na from NaCl
    D
    `Ca^(2+)` can reduce NaCl to Na

  • Sodium is made by the electrolysis of a molten mixture of about 40% NaCl and 60% CaCl_2 because

    A
    `CaCl_2` helps in conduction of electricity
    B
    this mixture has a lower melting point than NaCl
    C
    `Ca^(2+)` can displace Na from NaCl
    D
    `Ca^(2+)` can reduce NaCl to Na.