Use the reaction to complete the activity. KOH + HBr → KBr + H2O A student sets up a titration apparatus with 25 mL of potassium hydroxide in the flask. In three to five sentences, explain how the student can use a 0.1 M solution of hydrobromic acid to determine the concentration of potassium hydroxide in the reaction.
To determine the concentration of potassium hydroxide (KOH), the student can perform a titration with the 0.1 M solution of hydrobromic acid (HBr). The student would slowly add the HBr solution to the flask containing the 25 mL of KOH solution while monitoring the pH of the solution using an indicator or pH meter. At the equivalence point, which is when the moles of HBr react fully with the moles of KOH, the pH of the solution will change significantly. By recording the volume of HBr solution needed to reach the equivalence point, the student can calculate the number of moles of HBr used. Since the stoichiometry of the reaction is 1:1 between KOH and HBr, the number of moles of HBr used is equal to the number of moles of KOH present in the flask. By dividing the moles of KOH by the volume of KOH solution used, the student can calculate the concentration of the KOH solution.
