(A) A particular solution of NaOH is supposed to be approximately 0.100 M. To determine the exact molarity of the NaOH(aq), a 0.5000 g sample of KHC₈H₄O₄ is dissolved in water and titrated with 24.03 mL of the NaOH(aq). What is the actual molarity of the NaOH(aq)?

HC₈H₄O₄^-(aq) + OH^-(aq) → C₈H₄O₄^2-(aq) + H₂O(l)

(B) A 0.235 g sample of a solid that is 92.5% NaOH and 7.5% Ca(OH)₂, by mass, requires 45.6 mL of a HCl(aq) solution for its titration. What is the molarity of the HCl(aq)?