Redox Reactions And Electrochemistry Ques 12
Question: In alkaline medium $ ClO_2 $ oxidize $ H_2O_2 $ in $ O_2 $ and reduced itself in $ C{{l}^{-}} $ then how many mole of $ H_2O_2 $ will oxidize by one mole of $ ClO_2 $ [Kerala CET 2005]
Options:
A) 1.0
B) 1.5
C) 2.5
D) 3.5
E) 5.0
Show Answer
Answer:
Correct Answer: C
Solution:
$ ClO_2\to C{{l}^{-}} $
$ ClO_2+2H_2O+5e\to C{{l}^{-}}+4O{{H}^{-}} $
$ H_2O_2\to O_2 $
$ H_2O_2+2O{{H}^{-}}\to O_2+2H_2O+2e $
$ ClO_2+2H_2O+5e\to C{{l}^{-}}+4O{{H}^{-}}]\times 2 $
$ H_2O_2+2O{{H}^{-}}\to O_2+2H_2O+2e]\times 2 $
$ 2ClO_2+5H_2O_2+2O{{H}^{-}}\to 2C{{l}^{-}}+5O_2+5H_2O $
$ 2ClO_2\equiv 5H_2O_2 $
$ \therefore $ $ ClO_2=2.5H_2O_2 $
