Titration (1 Viewer)

[Study_like_a_nerd]

What would be the accuracy, reliability and validity for titration??? Thx

 

[liquid_soda]

reliability
If you repeated the experiment and received constant results or results that are close to each other
accuracy
If you recognised the end point properly and correctly read the amounts used in the neutralization
validity
It must be a fair test where there are constant controlled variables with each trial. And how was your method able to be used to perform the titration?

 

[BlueGas]

This is taken out of my recent titration report but you can modify it to suit your report.

Accuracy and Validity:

- Rinse burette in solution of the same composition as to be used for the titration.
- Align eye level to be horizontal with the meniscus.
- Read from the bottom of the meniscus.
- Check the equivalence point for the acid/base reaction in your titration and ensure the indicator selected will change at the appropriate pH.
- Rinse the flask with distilled water.
- Use pipettes to accurately measure the volume of solution in flask.
- Use a swirling action to ensure the titrant is thoroughly mixed or an electronic stirrer.
- Do a ‘rough draft’ first to establish approximately where the end point will be.
- When close to the end point, add titrant drop by drop, swirling between each added drop.
- Use a white background to help read accurately the meniscus and see the colour change in the reaction or use a calibrated pH meter or data logger to accurately determine the end point.


Reliability:

Reliability is about consistency of results. Reliability occurs when you replicate the titration and average the results. Results may be consistently similar (i.e. reliable) but if the same error is being repeated or equipment is inaccurate, the results are not valid nor accurate. Compare results with others to know how reliable your results are.

 

[someth1ng]

Accuracy: how close was it to the ACTUAL value?
Reliability: did you repeat the experiment and get consistent results?
Validity: was the experimental method logically sound? (eg you can't do titration using conical flasks and measuring cylinders)