Question

Question #ba5d6

Answer 1

0.29 M

Explanation:

Since the NaOH solution completely reacted ( completely neutralized ) the HCl, this would mean that moles `OH^- = H^+`.

- Find the number of `OH^-` moles

0.5M NaOH * 14.5 mL = 7.25 mmol NaOH `rarr` 7.25 mmol `OH^-`

- Find the concentration of HCl

`OH^- = H^+` = 7.25 mmol

?M HCl = `(7.25 mmol) / (25 mL)` = 0.29 M