How does temperature affect titration?
Any property of the solution that can be monitored and will change at the equivalence point can be used for a titration. The temperature will increase as long as the reaction continues, then decreases as excess titrant is added.
What can affect titration results?
The Titration Process Is Influenced by the Following Factors:
- Measuring method.
- Instrument (instrument uncertainty/abrasion of the burette)
- Electrodes (electrode uncertainty/alteration of electrodes)
- Handling.
- Balance (weighing error)
- Temperature.
What is titration error How can it be Minimised?
The titration error can be reduced by using a blank titration because in a blank titration the quantity of titrant required to reach the endpoint in the absence of analyte can be subtracted from the quantity of titrant required to reach the endpoint in the presence of an analyte. This reduces the titration error.
How do you reduce error in a titration?
Reducing uncertainties in a titration To reduce the uncertainty in a burette reading it is necessary to make the titre a larger volume. This could be done by: increasing the volume and concentration of the substance in the conical flask or by decreasing the concentration of the substance in the burette.
Where does heat come from in neutralization reactions?
The heat (or enthalpy) of neutralization (ΔH) is the heat evolved when an acid and a base react to form a salt plus water. Q in the above equation is -ΔH and is expressed in kJ/mol of water. Neutralization reactions are generally exothermic and thus ΔH is negative.
Why does temperature decrease at end of titration?
So the highest temperature is found when enough acid has been added to neutralise all of the sodium hydroxide. After this point the temperature drops because the acid now being added is at a lower temperature than the reaction mixture.
What are the precautions taken during titration?
Just like in any other techniques, titration comes with certain precautions. (1) Make sure to always vigorously shake that flask after every drop if the end point is still unknown. It may be that the remaining volume of the titrant needed to reach the end point is just adhering on the wall. This is to ensure accuracy.
Can titration error completely be eliminated?
Some of them are typical human errors, that can be limited by sticking to lab procedures, but as long as there is a human operator involved, they will be never completely eliminated. Some of possible cases are: Misjudging the color of the indicator near the end point – this is probably the most common one.