Answer: The pOH value is 2.
Explanation:
Given: [tex][H^{+}] = 9.9 \times 10^{-13} M[/tex]
pH is defined as the negative logarithm of hydrogen ion concentration.
Hence, pH of the given solution is calculated as follows.
[tex]pH = -log [H^{+}]\\= - log (9.9 \times 10^{-13})\\= 12[/tex]
The relation between pH and pOH is as follows.
pH + pOH = 14
Therefore, pOH is calculated as follows.
pH + pOH = 14
12 + pOH = 14
pOH = 14 - 12
= 2
Thus, we can conclude that the pOH value is 2.