1.

How is chlorine manufactured by the electrolytic process?

Answer»
  • On a large scale chlorine is obtained by an electrolytic process. 
  • The electrolyte is brine, a concentrated solution of NaCl. 
  • Nelson’s two compartments diaphragm cell is used for electrolysis in which stout graphite rod is used as an anode while U shaped steel vessel is used as a cathode. 

Reactions : 

NaCl → Na+ + Cl- 

H2O ⇌ H + OH

At cathode : 

2H2O + 2e → H + 20H+

Na+ + OH- → NaOH

At anode : 

2Cl → 2Cl + 2e- 

2Cl → Cl2(g)


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