Describe how you would design and perform a titration in which you use 0.250M HNO3

Answer 1

To perform an endpoint titration with 0.25 M HNO₃, I would deliver a specific quantity of 0.25 M HNO₃ into a volumetric flask using a biuret and record that quantity, then I would add a pH indicator into the flask, let's say phenolphthalein (works best for strong acid and strong base titrations). It is important to note that phenolphthalein is colorless in acid, therefore, the solution would be colorless. Now with caution I would slowly add minuscule quantities of the base into the solution and look for color change, and then stop adding base when the solution is a pale pink. This is the hardest part, as if the solution becomes dark pink, you have added too much base and the solution is now basic. When the solution turns a pale pink, stop the titration and record the quantity of the base added.