Question

oxidation number of o in cao2 is ​

Answer 1

Answer:

-1

Explanation:

Let oxidation number of oxygen be x.

Calcium (element of group 2) always shows an oxidation state(number) of +2.

For CaO₂, oxidation state is

+2 + 2x = 0

⇒ 2x = -2

⇒ x = -1

Answer 2

The Oxidation Number Of Oxygen In Cao₂ Is -1

Given:

A compound with the molecular formula CaO₂

TO FIND

The oxidation number of oxygen in Calcium peroxide.

SOLUTION:

We can simply solve the problem as under-

The oxidation number is the degree of oxidation of atom in a chemical compound.

we know that,

The oxidation number of Calcium = +2 ( as it belongs to the second group in the periodic table )

Let, the oxidation number of Oxygen in CaO₂ be x

Total charge in the molecule = 2+2x

Now we know that the sum of the oxidation number of all the atoms in a neutral compound is zero.

so, 2x+2 = 0

2x. = -2

x= -1

Thus, the oxidation number of Oxygen in CaO₂ is -1

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