KOH + HBr —> KBr + H20

Question

A student sets up a titration apparatus with 25 mL of potassium hydroxide in the flask. In three to five sentences, explain in a simple way how the student can use a 0.1 M solution of hydrobromic acid to determine the concentration of potassium hydroxide in the reaction.

Answer 1

To determine the concentration of potassium hydroxide, the student can perform a titration. Titration involves slowly adding a known concentration of hydrobromic acid to potassium hydroxide until the reaction is complete. The student can use a pH indicator, such as phenolphthalein, which changes color when the reaction is neutralized. By measuring the volume of hydrobromic acid required to neutralize the potassium hydroxide, the student can calculate its concentration using the equation M1V1 = M2V2 (where M1 is the concentration of hydrochloric acid, V1 is the volume used, M2 is the concentration of potassium hydroxide, and V2 is the volume of potassium hydroxide).