if air bubbles remain in the burette during the titration, what will the effect be on the calculated values of ::
a- the concentration of NaOh
b- the molarity of H2SO4
??
It all depends upon when the air bubbles were there, if they changed in size during the titration, or if they were dispensed in the titration.
Go back to the NaOH/H2C2O4 titration did, work up the formulas used to calculate the M of the NaOH and the M H2SO4 and go through the logical sequence.
no effect
If air bubbles remain in the burette during the titration, it can affect the calculated values of the concentration of NaOH and the molarity of H2SO4. Here's the effect on each of them:
a) Concentration of NaOH:
If air bubbles are present in the burette during the titration, it can cause incorrect volumes of NaOH solution to be recorded. This will lead to lower volume readings than the actual volume of NaOH added to reach the endpoint. As a result, the calculated concentration of NaOH will be higher than the actual concentration.
b) Molarity of H2SO4:
Similarly, the presence of air bubbles in the burette can cause incorrect volumes of H2SO4 to be measured. This will result in higher volume readings than the actual volume of H2SO4 required to neutralize NaOH. As a consequence, the calculated molarity of H2SO4 will be lower than the actual molarity.
It is important to eliminate air bubbles in the burette before conducting titrations to obtain accurate and reliable results.
If air bubbles remain in the burette during the titration, it can have an effect on the calculated values of both the concentration of NaOH and the molarity of H2SO4. Here's why:
a) Effect on the concentration of NaOH:
During the titration process, the burette is used to measure the volume of the titrant (in this case, NaOH) needed to react completely with the analyte (in this case, H2SO4). The volume of titrant required is used to calculate the concentration of NaOH.
However, if air bubbles are present in the burette, they can occupy part of the volume intended for the NaOH solution. This means that less NaOH solution will be delivered as titrant, leading to a lower volume reading on the burette. Consequently, the calculated concentration of NaOH will appear to be higher than the actual concentration.
b) Effect on the molarity of H2SO4:
The molarity of H2SO4 is determined based on the stoichiometry of the balanced chemical equation and the volume of titrant (NaOH) required to react with the analyte (H2SO4).
If air bubbles are present in the burette, they can displace some of the NaOH solution, resulting in a lower volume reading. As a result, the calculated molarity of H2SO4 will be higher than the actual molarity because a smaller volume of NaOH solution will be used in the calculation.
To minimize the impact of air bubbles in the burette during titration, it is important to ensure that the burette is properly filled, and any air bubbles are removed before starting the titration. This can be done by filling the burette almost to the top, and then slowly releasing the solution to remove any trapped air bubbles. Proper techniques and precautions should be followed during the titration process to obtain accurate results.