Question

The oxidation number of Co in [Co(NH3)3](NO2)3] is

Answer 1

Answer:

+3 is the answer

Explanation:

Refer attachment for explanation!!

Answer 2

Given: The given complex is $[Co(NH_3)_3(NO_2)_3]$.

To find: We have to find the oxidation state of Co.

Solution:

The compound is $[Co(NH_3)_3(NO_2)_3]$.

We know that the change of amine is 0 and the change of nitrite group is -1.

The overall charge of the complex is 0.

Let the oxidation state of Co be x.

So, we can write-

$x + 0 + ( - 1) \times 3 = 0 \\ x - 3 = 0 \\ x = + 3$

The value of x is +3.

Hence the oxidation state of Co is +3.