Answer to Question #77379 in General Chemistry for Kristina

Question

If it takes 24.1 mL of a 0.638 M sodium hydroxide solution to neutralize 29.6 mL of a HCl solution, calculate the concentration of the HCl solution.

Answer 1

The balanced equation:
NaOH + HCl → NaCl + H2O
So, the ratio of reagents is 1:1.
Amount of NaOH: 0.638 ∙ 24.1 = 15.3758 mmol
Amount of HCl is the same.
Concentration of HCl: 15.3758 / 29.6 = 0.519 M