Question

An aqueous solution of sodium hydroxide is standardized by titration with a 0.198 M solution of perchloric acid. If 15.0 mL of base are required to neutralize 25.4 mL of the acid, what is the molarity of the sodium hydroxide solution? ___ M sodium hydroxide

Answer 1

Using the neutralization equation

M1V1 = M2V2

M1 = 0.198 M

V1 = 25.4 ml

M2 = molarity of sodium hydroxide

V2 = 15 ml

M2 = (M1V1) /V2 = 0.335 M

Molarity of NaOH = 0.335 M