Question

What is the role of indicators in titration?

Answer 1

Titration:

Titration refers to the act of adding a known solution to an unknown solution in order to complete the reaction.

Indicator:

The final point is indicated either by the physical change in the reaction or by the addition of an auxiliary reagent is known as an indicator.

The following is a description of the indicator's involvement in the titration process:

1. It shows a visible change in terms of color change and turbidity in the titrated solution.
2. Fast reaction and alteration in physical or chemical change of the solution at the equilibrium point are shown by the indicator.
3. The selection of indicators for acid-base titration should be based on the exhibited color change at pH which is close to the equivalence point.
4. Methyl orange is the best indicator of strong acid and weak titration.
5. Phenolphatelin indicator is good for a strong base and weak acid titration.
6. For the strong acid and strong base titration used either Methyl orange or Phenolphatelin.
7. There is no indicator for the weak acid and weak base titration.