Answer :
A solution of known concentration that is slowly added to a solution of unknown concentration is called titrant.
Titration is the steady addition of a known concentration solution (called a titrant) to a known volume of an unknown concentration solution until the reaction approaches neutralization, which is sometimes indicated by a color change.
Until the reaction is complete, the analyte (the unknown solution) is normally added in a known amount to the titrant (the known solution) through a buret. Knowing the volume of titrant added allows the concentration of the unknown to be calculated. An indicator is often used to indicate the reaction's endpoint or end of reaction.
Therefore, titration is a technique used to determine the concentration of an unknown solution.
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