Can you do a titration without indicator?
If you want to execute an acid base titration without any indicator, then you could use a pH meter. On the meter you must continuously check the (changing) pH values: In the equivalence point, the pH change is at its maximum; a sudden big pH change shows up.
How do you find the endpoint of a titration?
The end point of a titration is the point at which the indicator changes color. When phenolphthalein is the indicator, the end point will be signified by a faint pink color.
What is the endpoint point of a titration?
End Point. end point: the point during a titration when an indicator shows that the amount of reactant necessary for a complete reaction has been added to a solution.
Why there is no need of indicator in this titration?
When used in redox titration, it get reduced into brown coloured Mn2+ ion(In acidic media) at end point and colour change at end point can be detected easily. Since detecting end point is the role of indicator, later is not required in Permanganate titration.
Is indicator important in titration?
The common application of indicators is the detection of end points of titrations. The colour of an indicator alters when the acidity or the oxidizing strength of the solution, or the concentration of a certain chemical species, reaches a critical range of values.
What happens if you titrate past the endpoint?
Overshooting the endpoint would cause the final volume reading to be a higher a higher value in the buret. This would decrease the molarity by adding a larger value to the denominator in the mol/L expression.
Why do redox titrations not need an indicator?
Redox titrations will involve a reducing and oxidizing agent reacting together, but indicator is normally not used like it is in acid-base titrations. This means that one of the reactants used has to be one with a color difference between its reduced and oxidized form.
Why is an indicator needed to perform these titrations but was not needed in the redox titrations of KMnO4?
Because potassium permanganate has a deep violet colour which is highly visible to the naked eye and when one titrates it and there is a loss of colour, it is apparent. So one does not need an indicator to tell you the end point. Potassium Permanganate is an oxidizing agent, which is of deep violet colour.
Why doesn’t the indicator affect the titration results?
In all titrations, the amount of indicator added to the solution to be titrated is just a small amount. This is because even at very low concentration…
When should you stop a titration?
You should stop adding titrant when a pale color that persists throughout the solution for several seconds is observed. If the solution is intensely pink, you should either disregard the data or back-titrate the sample. IMAGE 2a.
What happens if you use the wrong indicator in a titration?
In contrast, using the wrong indicator for a titration of a weak acid or a weak base can result in relatively large errors, as illustrated in Figure 17.3. 3.