Question

please help on all questions and explain because i really need help in this!!! :)

1) After rinsing the buret with water, filling the buret with the solu forgot to do this? the buret with water, why was it rinsed three times with the NaOH solution before uret with the solution? How would this affect your final molarity of NaOH, if you 2) Does the amount of water used to dissolve the KHP affect the molarity of the NaOH solution? Explain. 3) Why do you think you have to run three trials instead of just one? 4) When filling the buret with NaOH solution, an air bubble was left in the buret tip. The bubble was released during the first titration. How would this affect the molarity of the NaOH solution? Explain. 5) After completing the titration, droplets of titrant were clinging to the inner wall of the buret. How would this affect the molarity of the NaOH solution? Explain. 6) After completing the titration, a droplet of titrant was hanging on the tip of the buret. How would this affect the molarity of the NaOH solution? Explain.

Answer 1

1. If we fill the buret with NaOH just after by washing water, some of the sodium hydroxide molecule after coming into contact with water will break into it's ions. And this will reduce the Molarity of NaOH solution.

2. We find the Molarity of NaOH by using the Molarity of KHP. So it is important to make the solution of KHP with accuracy.

3. Running three trial instead of one is because to get the accuracy in the result. Taking three trails will decrease the human error.

4. If there is bubble in the buret, the volume will be less as expected. And the volume and Molarity have inverse relation. The Molarity will increase if there is air bubble in the buret.