5. A student performs a series of titrations in order to standardize a solution of hydroiodic acid. They complete the following data table. Titration of 25.0 mL of hydroiodic acid with 0.225 mol/L sodium hydroxide Trial # Initial Burette Volume (mL) Final Burette Volume (mL) 1 0.20 21.52 2 21.52 41.10 3 1.50 20.94 4 20.94 40.76 5 0.50 19.99 Based on their observations, what is the concentration (in mol/L) of the hydroiodic acid solution? (5 marks)

Fig: 1