Answer
(a) $pH = 3.0$
(b) $pH = 13.9$
Work Step by Step
(a) 1. HCl is a strong acid, therefore:
$[HCl] = [H^+] = 0.0010M$
2. Use the pH formula to find the pH value:
$pH = -log[H^+]$
$pH = -log(0.0010)$
$pH = 3.0$
(b) 1. KOH is a strong base, therefore:
$[KOH] = [OH^-] = 0.76M$
2. Use the pOH formula to find the pOH:
$pOH = -log[OH^-]$
$pOH = -log[0.76]$
$pOH = 0.12$
3. Find the pH:
$pH + pOH = 14.0$
$pH + 0.12 = 14.0$
$pH = 14.0 - 0.12$
$pH = 13.9$
