Define the end point of a titration. It is when a change that indicates equivalence is observed in the analyte solution. It is a synonym for equivalence point. It is the point at which the pH no longer changes.

Answer : The correct option is, It is when a change that indicates equivalence is observed in the analyte solution.

Explanation :

Titration : It is a laboratory process where we have to use the volume of a solution of known concentration to determine the concentration of unknown solution.

Titrations mostly occur in redox reactions and acid-base reactions.

During the process of titration, there are two important stages which are endpoint and equivalence point.

Equivalence point : It is a point in which the added titrant is equivalent to the analyte in the sample.

Endpoint : It is a point where the indicator changes its colour that means it is a change that indicates equivalence observed in the analyte solution.

Hence, the correct option is, It is when a change that indicates equivalence is observed in the analyte solution.

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