# Find the oxidation state of sodium in Na2O2.

Question:

Find the oxidation state of sodium in $\mathrm{Na}_{2} \mathrm{O}_{2}$.

Solution:

Let the oxidation state of Na be x. The oxidation state of oxygen, in case of peroxides, is –1.

Therefore,

$2(x)+2(-1)=0$

$2 x-2=0$

$2 x=2$

$x=+1$

Therefore, the oxidation sate of sodium is +1.