Homework Help

Chlorine is used to prevent the growth of bacteria in swimming pool water. It reactsas...

user profile pic

roshan-rox | (Level 1) Valedictorian

Posted May 31, 2013 at 12:13 PM via web

dislike 1 like

Chlorine is used to prevent the growth of bacteria in swimming pool water. It reacts
as shown below.


Cl_2(aq) + H_2O(l) <-----------> HCl(aq) + HClO(aq)

By giving appropriate oxidation numbers, explain why this is a
disproportionation reaction.

1 Answer | Add Yours

Top Answer

user profile pic

jerichorayel | College Teacher | (Level 1) Senior Educator

Posted May 31, 2013 at 3:49 PM (Answer #1)

dislike 2 like

Disproportionation reaction is a type of redox reaction in which a species is both oxidized and reduced at the same time. Let us try to solve this reaction by giving out the oxidation state of every species.

    0         +1  -2        +1   -1        +1 +1 -2   

`Cl_(2)_(aq) + H_(2)O_((l)) <=> HCl_((aq)) + HClO_((aq))`

 

Looking at the reaction, chlorine has two oxidation numbers in the products side. HCl has an oxidation number of -1 and HClO has an oxidation number of +1.

So if we have to take the chlorine alone, it can be written as:

`Cl ^(0) -> Cl ^(-1) + Cl ^(+1)`

 

Sources:

Join to answer this question

Join a community of thousands of dedicated teachers and students.

Join eNotes