Answer
(a) $pOH = 4.92$
(b) $pOH = 7.20$
(c) $pOH = 12.86$
(d) $pOH = 3.365$
Work Step by Step
1. Calculate the pOH Value
$pH = -log[H_3O^+]$
$pH = -log( 8.3 \times 10^{- 10})$
$pH = 9.08$
$pOH + pH = 14$
$pOH = 14 - pH = 14 - 9.08$
$pOH = 4.92$
2. Calculate the pOH Value
$pH = -log[H_3O^+]$
$pH = -log( 1.6 \times 10^{- 7})$
$pH = 6.80$
$pOH + pH = 14$
$pOH = 14 - pH = 14 - 6.80$
$pOH = 7.20$
3. Calculate the pOH Value
$pH = -log[H_3O^+]$
$pH = -log( 0.073)$
$pH = 1.14$
$pOH + pH = 14$
$pOH = 14 - pH = 14 - 1.14$
$pOH = 12.86$
4. Calculate the pOH value:
$pOH = -log[OH^-]$
$pOH = -log(4.32 \times 10^{-4})$
$pOH = 3.365$
