Question

question 3 of 10
what is the oxidation state of p in $po_4^{3-}$?

a. +2

b. +8

c. +5

d. +3

Explanation:

Step1: Set variable for P's oxidation state

Let oxidation state of P = $x$. Oxidation state of O = -2.

Step2: Sum oxidation states to ion charge

$x + 4(-2) = -3$

Step3: Solve for x

$x - 8 = -3 \implies x = +5$

Answer:

C. +5