Question

Discussion Explain how the calculated molarity of NaOH would be affected by each of the following experimental errors during the standardization of a NaOH solution. In each case you must also state if the calculated molarity is higher or lower than the expected molarity. Be sure to make use of the formula for calculating concentration of NaOH in your answer.
q1)Air bubbles at the tip of the burette were not removed before start the titration?​

Answer 1

If air bubbles are present at the tip of the burette when the titration is being done, the air bubbles will contribute a small volume to the NaOH solution. Thus, the actual volume of NaOH solution used will be slightly lesser than the apparent volume. Thus we will tend to measure a volume that is slightly higher than the actual volume of NaOH used for titration in our calculations. Thus the molarity by calculation will be slightly lesser than the expected molarity of the NaOH solution.