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How is chlorine obtained in the laboratory ? How does it react with the following ? KI

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How is chlorine obtained in the laboratory ? How does it react with the following ?
KI
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In the laboratory chlorine is prepared by the oxidation of HCl with `MnO_(2)`.
`4HCl+"MnO"_(2)to"MnCl"_(2)+2" H"_(2)O+Cl_(2)uarr`
`Cl_(2)` reacts with KI to liberate iodine
`Cl_(2)+2" KI"to2" KCl"+I_(2)uarr`
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