Question #3d976

1 Answer
Dec 7, 2016

Answer:

#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 .