Question

How would you calculate concentration from titration?

Answer 1

Titration is the laboratory method used to determine the concentration of one chemical compound based on its complete reaction with another compound whose concentration is known. The compound whose concentration is known is known as titrant and the other one whose concentration is unknown is known as analyte.

Complete answer:
Let us study the titration reaction and then answer the given illustration;
Titration is the method of knowing concentration or the end point of a solution; carried out commonly in the laboratory. When an acid-base reaction takes place, the end point indicates the neutralised products.
At the end points the volume of the analyte and the titrant are known. The known volumes along with the information of known concentration of the titrant can help us find the concentration of analyte.
The equation at end point is given as,
${{M}_{a}}{{V}_{a}}={{M}_{b}}{{V}_{b}}$
where,
${{M}_{a}}$ = concentration which is unknown i.e. analyte
${{V}_{a}}$ = known volume of analyte
${{M}_{b}}$ = concentration which is known i.e. titrant
${{V}_{b}}$ = known volume of titrant
Thus, concentration of analyte can be calculated as,
${{M}_{a}}=\dfrac{{{M}_{b}}{{V}_{b}}}{{{V}_{a}}}$

Note:
The end-point is also known as the equivalence point and that is why the above equation has empirical results.
Do note that the conversion of units among the volumes of acid and base is not necessary as long as both are expressed in the same units.