what is a standard solution? and what is a function of an indicator in a titration?
A standard solution is one which has been standardized; i.e., the concn has been determined and you know the concn with certainty.
An indicator is used in titration procedures to tell the analyst the end point (it "indicates" the end point of the titration).
In simple terms, a standard solution is a solution with a concentration that you know, example is a container labelled 1M, it means the content is a standard solution.
An indicator is used to find when the acid and base are completely neutralized in titration
A standard solution is a solution with a known concentration of a substance. It is prepared by accurately measuring a known mass or volume of a pure substance and dissolving it in a suitable solvent. Standard solutions are essential in analytical chemistry because they serve as references or calibration standards to determine the concentration of unknown substances.
On the other hand, an indicator is a substance used in titrations to signal when the reaction between the analyte (substance being analyzed) and the titrant (solution of known concentration) is complete. Indicators undergo a noticeable and distinct color change at or near the equivalence point of the titration.
The function of an indicator in a titration is to provide a visible signal to indicate the completion of the reaction. When the indicator changes color, it means that the stoichiometrically equivalent amounts of the analyte and titrant have reacted, and no further titrant is required. As a result, the indicator allows the endpoint of the titration to be determined, helping to determine the concentration of the analyte in the solution being analyzed.
To summarize, a standard solution is a solution with a known concentration used as a reference in analytical chemistry. An indicator is a substance used in titrations to signal the completion of the reaction by a noticeable color change, helping to determine the endpoint of the titration.