Question

Question #3d976

Answer 1

`2Ca (s)+ O_2(g) =>2CaO(s)`

Explanation:

I'm going to assume that this is the chemical system:

`2Ca (s)+ O_2(g) =>2CaO`

and then the reaction can be shown by simply balancing the chemical equation.

The equation is both mass and charge balanced. No notation to show a charge is needed.

Because you mention charge, I will go over the oxidation state.

The oxidation state for `Ca` and `O_2` are `0+`

In the species `CaO_2`:

`Ca` has an oxidation state of `2+`
`O` has an oxidation state of `2-`.

Calcium is oxidized and oxygen is reduced .