What is the name of the technique in which one solution is used to analyze another?

• A. Buffer
• B. Endpoint
• C. Titration
• D. Equivalence Point

Answer: (C)

Titration is the technique where a solution of known concentration is used to analyze another solution. By gradually adding the standard solution (the titrant) to the unknown solution (the analyte) until the reaction is complete, you can determine the analyte’s concentration from the amount of titrant used and the reaction’s stoichiometry. An indicator or a pH change signals the endpoint, which is the practical moment to stop, and it closely corresponds to the equivalence point, the true stoichiometric balance. The other terms describe parts of the process or the system (a buffer resists pH changes; the endpoint is the signal; the equivalence point is the actual balance), but the method itself is titration.