Explain electrolysis of concentrated aqueous solution of Nacl between graphite electrodes.

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Solution

Dear student,

When concentrated NaCl solution undergoes electrolysis, sodium hydroxide and hydrogen are produced at the cathode while chlorine is produced at the anode.
$C a t h o d e : 2 H_{2} O + 2 e^{-} \underset{}{\to} H_{2} + 2 O H^{-} A n o d e : 2 C l^{-} \underset{}{\to} C l_{2} + 2 e^{-} N e t c e l l r e a c t i o n : 2 N a C l (a q) + 2 H_{2} O (l) \to 2 N a O H (a q) + C l_{2} (g) + H_{2} (g)$
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