what is titration and how it is done?

Answer 1

Assume you have an acid and a base, where the conc of base is unknown. You take a precise volume of the base (Vb) and to it you add a volume of the acid (Va) of concentration Ma until there is an indication that the acid-base rxn is over (typically a color change indicator dye). From the equation Va*Ma = Vb *Mb, Mb unknown, you find the value of Mb.

Vb is usually determined by a volumetric flask.
The solution is added to an Erlenmeyer flask, which can be swirled to provide mixing. The acid is usually placed in a titrating burette, and Va is found from the initial volume in the burette minus the final volume.

Answer 2

its taking a known concentration of something you know will react with the unknown concentration of something else and then slowly adding it until the reaction goes and then by knowing how much of one thing you added to the unknown you can determine the exact concentration of it.