Page 7 - 3. Lesson Notes - Ch-3 Mettalurgy-1

Fig- Electrolysis of Aqueous NaCl (Chlor Alkali Process)

➢ Differences between Electrolytic reduction of NaCl
and Chlor Alkali Process-

Electrolytic reduction of NaCl(l)- Chlor Alkali Process NaCl(aq)-

1. Electrolysis of Molten NaCl 1. Electrolysis of Aqueous NaCl

2. At the Cathode- Sodium metal 2. At the Cathode- Hydrogen gas is liberated.
is deposited.
3. At the Anode- Chlorine gas is 3. At the Anode- Chlorine gas is liberated
liberated
-
+
4. NaCl(l) → Na(s) + Cl(g) 4. NaCl(aq) + H2O(l) → NaOH(aq) + Cl2(g) +
H2(g)

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