What are some possible sources of error in a titration experiment?

Several factors can cause errors in titration findings, including misreading volumes, mistaken concentration values or faulty technique. Care must be taken as the solution of the known concentration is introduced into a specific volume of the unknown through laboratory glassware such as a burette or pipette.

What is indicator error in titration?

Endpoint is what is actually measured, a physical change in the solution as determined by an indicator or an instrument mentioned above. There is a slight difference between the endpoint and the equivalence point of the titration. This error is referred to as an indicator error, and it is indeterminate.

How can we avoid error in titration?

Acid Base Titration Sources of Error Improvements

1. Check the calibration of the balance.
2. Verify that the primary standard is properly dried.
3. Verify the precision of the glassware.
4. Use sufficient quantities of analyte and titrant.
5. Realize the limitations of the equipment.

Which indicator Cannot be used in a titration?

Litmus is not used in titrations because the pH range over which it changes colour is too great (pH range is 5.0 – 8.0) .

What is a good percent error for titration?

All burette readings should include 2 decimal places in which the second figure is either 0 or 5. An error of one drop in a volume of 25.00 cm3 gives a percentage error of 0.2% for each reading.

What is a good percent error in titration?

How do you know if a indicator is suitable for a titration?

When selecting an indicator for acid-base titrations, choose an indicator whose pH range falls within the pH change of the reaction. For example, in the titration of a strong acid with a strong base, the pH quickly changes from 3 to 11.

How is pH meter used for phosphoric acid titration?

Phosphoric Acid Titration Using pH meter Experiment 1. To titrate the polyprotic acid (H3PO4) using the strong base NaOH. That was done by using methyl orange, phenolphthalein as indicators and pH meter. The NaOH was added as a titrant. The polyprotic acid (H3PO4) was titrated with NaOH.

How to determine the pH of phosphoric acid?

Assuming 50 mL burette, aliquot taken for titration should contain about: As explained above, during titration of phosphoric acid we can use either methyl orange and detect first end point around pH 4.7, or thymolphthalein and detect second end point around pH 9.6.

Which is the titrant for phosphoric acid with NaOH?

Even with this problem, we can examine a generalized plot for the titration of phosphoric acid with sodium hydroxide (Figure 4). Figure 4. pH versus ml titrant for the titration of phosphoric acid (0.1 M, 30 mL) with NaOH (0.1 M).

Which is the best buffer for triprotic acid titration?

Citric acid is commonly used as a buffer for this pH region. It is also worth examining what would be observed for a similar plot of a different triprotic acid. The data in Table 5 is for an identical titration of phosphoric acid.