Question

Calculate the oxidation number of mgco3

Answer 1

Answer:

+2

Explanation:

• for carbon :+4
• for oxygen :-2

oxidation number for mgco3:

x+4+3(-2 )=0

x=6-4

x =mg= +2

Answer 2

There is an ionic bond between magnesium and carbonate.

To calculate the oxidation number on carbon atom we will first have to find the charge on carbonate ion.

Now, magnesium makes bond in +2 oxidation state (as it belongs to alkaline earth metals).

So the charge on magnesium is +2 and that on carbonate will be -2.

Oxygen generally has a charge of -2. Here there are 3 oxygen atoms so, the total charge for oxygen will be -6.

Now, let the oxidation number of carbon be x.

CO²⁻  ,     x -6 = -2

                  x= -2 +6

                     = +4

The oxidation number of carbon comes out to be  +4.