An aqueous solution of sodium hydroxide is standardized by titration with a 0.170 M solution of perchloric acid. If 28.5 mL of base are required to neutralize 16.0 mL of the acid, what is the molarity of the sodium hydroxide solution?

0.095M

Explanation:

HClO4 + NaOH = NaClO4 + H2O

Concentration of acid CA = 0.170M

Concentration of base CB=?

Volume of base VB = 28.5ml

Volume of acid VA = 16.0ml

Number of moles of acid nA = 1

Number of moles of base nB = 1

From

CAVA/CBVB = nA/nB

CB = CAVAnB/VBnA

CB = 0.170*16.0*1/28.5*1

CB = 0.095M