Analyse titration curves to calculate the concentration of a solution with reference to a standard solution. Chem istry 2025 v1.3 The following subject matter may be assessed in the internal assessments.

A 15.0 mL volume of a weak monoprotic acid (HA) was pipetted into a volumetric flask and diluted to a final volume of 75.0 mL using distilled water. A 20.0 mL aliquot of the HA solution was then titrated with 0.200 M sodium hydroxide (NaOH). The reaction and titration curve are shown. Reaction: HA(aq) + NaOH(aq) → NaA(aq) + H₂O(l) Calculate the concentration of HA in the original 15.0 mL solution. Show your working.

A 20.0 mL sample of a weak monoprotic acid (HA) was titrated with 0.150 mol L⁻¹ sodium hydroxide (NaOH). The titration curve shows the equivalence point occurs at 24.0 mL of NaOH added. What is the concentration of the HA solution?

Calculate the concentration of the hydrochloric acid in the original 20.0 mL solution. Show your working.

A \(20.0\) mL sample of sodium hydroxide (NaOH) solution is titrated with \(0.150\) mol L\(^{-1}\) hydrochloric acid (HCl). According to the titration curve shown, what is the concentration of the NaOH solution?