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CBSE Class 10 Answered

write the balanced chemical equations for the following, aqueous sodium chloride on electrolysis gives sodium hydroxide chlorine and hydrogen gas.
Asked by sajal2402 | 30 Jul, 2018, 06:14: PM
answered-by-expert Expert Answer
(a)Electrolysis of the aqueous solution of NaCl:
At cathode:
H+ + e- → H
H + H → H2
 
At Anode:
4OH- -4e- → 4OH
2OH +2OH → 2H2O + O2
 
(b)Electrolysis of the concentrated NaCl solution:
 
At cathode:
H+ + e- → H
H + H → H2

 
At anode:
Cl- - e- → Cl
Cl + Cl → Cl2
 
Na+  + OH- → NaOH
Answered by Ramandeep | 30 Jul, 2018, 06:48: PM

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