What volume of sodium hydroxide (0.129 M) is needed to titrate 15.22 mL of perchloric acid (HClO4 (aq)) with molarity of 0.225 M ?

A titration is carried out to determine the concentration of the acid in an old bottle of aqueous HClHCl whose label has become unreadable. What is the HCl concentration if 75.3 mL of 0.250 M NaOH is required to titrate a 10.0 mL sample of the acid?

The molarity of an aqueous solution of potassium hydroxide,KOH, is determined by titration against a 0.234M nitric acid,HNO3,solution.   If 29.6 mL of the base are required to neutralize 21.9 mL of nitric acid, what is the molarity of the potassium hydroxidesolution? Molarity = M

A 1.4350-gram of KHP (actual formula = KHC8H4O4; molar mass = 204.22 g/mol) was dissolved in 50.00 mL of deionized water. The resulting solution was titrated with NaOH solution of unknown concentration. If 32.85 mL of the NaOH solution was required to reach the equivalent point, what was the molar concentration of the NaOH solution? The acid-base reaction is as follows:                 KHC8H4O4(aq)  +  NaOH(aq)  -->   NaKC8H4O4(aq)  +  H2O(l)          (A) 0.1405 M           (B) 0.2139 M           (C) 0.08481 M           (D) 7.0267 x 10–3 M