# What is the oxidation state of "Pb" in "PbO"_2 ?

Mar 16, 2018

It is $+ 4$.

#### Explanation:

In ${\text{PbO}}_{2}$, oxygen exhibits an oxidation number of $- 2$ (since it's not a peroxide or superoxide):

Let the oxidation number of $\text{Pb}$ be $x$. Then, for the compound to be neutral, the oxidation numbers of all atoms should add up to zero.

$\implies x + \left(- 2\right) + \left(- 2\right) = 0$

$x = + 4$

So the oxidation no. of $\text{Pb}$ is $+ 4$.

Hope it helps!