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Question : 4
Total: 35
Four half reactions I to IV are shown below:
I.2 C l − → C l 2 + 2 e −
II.4 O H − → O 2 + 2 H 2 O + 2 e −
III.N a + + e − → N a
IV.2 H + + 2 e − → H 2
Which two of these reactions are most likely to occur when concentrated brine is electrolysed?
I.
II.
III.
IV.
Which two of these reactions are most likely to occur when concentrated brine is electrolysed?
Solution: 👈: Video Solution
Explanation:
At anode2 C l − → C l 2 + 2 e −
(2) At cathode
N a + + e − → N a = E o = − 2.71 V
2 H + + 2 e − → H 2 , E o = 0 ~ V
Those have highE o value, that reaction will take place.
At anode
(2) At cathode
Those have high
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