What is the purpose of indicator in titration?

The role of indicator in titration is to detect the endpoint of the titration. When the colour of the solution changes, it indicates that the concentration of the chemical specie has reached a critical range. This change in colour is possible with the help of indicators.

What is the purpose of an indicator?

Indicators are substances whose solutions change color due to changes in pH. These are called acid-base indicators. They are usually weak acids or bases, but their conjugate base or acid forms have different colors due to differences in their absorption spectra.

What are different types of indicator used in titration?

Titration Indicator Titration. It is also known as titrimetry and volumetric analysis [1]. Indicator. A substance that changes color of the solution in response to a chemical change. Titration Procedure. Types of Titration. Indicators. The pH range of indicator. The pH range of indicators. Choosing indicator for titrations.

What makes a good indicator for titration?

In all cases, though, a good indicator must have the following properties: The color change must be easily detected. The color change must be rapid. The indicator molecule must not react with the substance being titrated. To minimize errors, the indicator should have a pKin that is within one pH unit of the expected pH at the equivalence point of the titration.

What do you mean by an indicator in titration?

A chemical indicator is added to the unknown analyte mixture and is used to signal the end of the titration. For example, when carrying out an acid-base titration, the indicator will change colour when the solution reaches a neutral pH.

What is the function of an indicator in titration?

What Is an Indicator for a Titration? Titration Endpoint. As you begin to titrate a chemical solution, you know the identity of your chemical, but you don’t know the concentration of your chemical. Function. When you reach the endpoint of your titration, the indicator changes color. Choice. Naturally Occurring Indicators. Considerations.