General Principle of Titrimetric Methods

Titrimetry permits us to determine a compound s concentration in a given solution by quantitatively measuring the quantity of reactant reacting with it. Let us titrate a compound A in a solution at concentration Q. Increasing and known volumes of its reactant B at concentration Q are added to an exactly known volume Va of solution A. B is chosen to react quantitatively with A according to a stoichiometric reaction. Let us call % the added volume when the reaction has just completed. The quantity of B that has disappeared is %Q. This is also the quantity of A that was initially present in the solution to analyze (after having taken into account the reaction stoichiometry). Then the determination of Q becomes immediate. For example, if one molecule of A reacts with one molecule of B (a one-to-one reaction stoichiometry), we find 

Vb/ is accessible via any experimental means that indicates the end of the titration reaction Cb and 1 are known. 

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