How is chlorine prepared by electrolytic method ? Explain its reaction with
NaOH

Explanation

Chlorine is obtainedby the electrolysis of brine solution. Chlorine is liberated at anode.
Brine solution is taken in a perforated U-shaped steel vessel. Graphite .rod acts as anode, steel vessel acts as cathode. `H_(2)` and NaOH are by products.

`NaCl to Na^(+) +Cl^(-)`
At anoe `2Cl^(-2) 2e to Cl_(2)`
`2H_(2)O+2e to 2OH^(-)+H_(2)`
`Na^(+)+OH to NaOH`
(i) With cold, dilute NaOH, chloride and hypochlorite are formed.
`2NaOH+Cl_(2) to NaCl+NaOCl+H_(2)O`