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  • Balance the following reaction using the half-reaction method. <img alt="I_2+OH^-\rightarrow xIO_3^-+yI^-+zH_2O" src="http://entrancecorner.oncodecogs.com/gif.latex?I_2&plus;OH%5E-%5C

Balance the following reaction using the half-reaction method.

I_2+OH^-\rightarrow xIO_3^-+yI^-+zH_2O

and find the value of x+y+z.

Option: 1

8


Option: 2

9


Option: 3

10


Option: 4

11


Answers (1)

best_answer

Half-reactions- 

1)  I_2+OH^-\rightarrow IO_3^-

2) I_2+12OH^-\rightarrow 2IO_3^-+6H_2O

3) I_2+12OH^-\rightarrow 2IO_3^-+6H_2O+10e^-

Balance the eqns by multiplying the second eqn by 5 and adding we get;

I_2+12OH^-+10e^-+5I_2\rightarrow 10I^-+2IO_3^-+6H_2O+10e^-

3I_2+6OH^-\rightarrow 5I^-+3H_2O+IO_3^-

x=1,y=5,z=3  x+y+z=9
Therefore,option(2) is correct

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