Question

What is the oxidation number for each element in the given compound and explain


ClO3 -

Answer 1

Q142464

What is the oxidation number for each element in the given compound and explain ClO₃ ^- ?

Solution:

The common oxidation number of oxygen in all compound is -2.

Exception :

The exception is peroxide where its oxidation number is -1 and

when oxygen is bonded to the more electronegative element Fluorine then the oxidation number of oxygen is +1.

Answer:

ClO₃^- is neither a peroxide nor it contains an oxygen bonded to Fluorine.

So, the oxidation number of oxygen in ClO₃ ^- , is -2.

Let us consider that the oxidation number of Cl is ‘x’ .

$$(Cl_1O_3)^ -$$

No subscript to Cl in ClO₃ ^- means the subscript is 1.

The subscript of O is 3.

We will set up the equation and find the value of ‘x’.

1 ( x ) + 3 ( -2 ) = -1 ;

x – 6 = -1 ;

add 6 on both the side we have

x – 6 + 6 = -1 + 6;

x = +5;

So the oxidation number of Cl is +5 and oxidation number of O is -2 in ClO₃^- ;