How do you find volume in a titration question?

1 Answer
Dr. Hayek
Aug 19, 2016

See below.

Explanation:

There are different types of titration, but in here I will assume that the question is about the titration is an acid-base titration.

Assuming we want to find how much base should be added to an acid with a known concentration.

In the question, it should be provided the following data:

Concentration of the acid: #M_a#.

Volume of the acid: #V_a#

Concentration of the base: #M_b#

and we will need to determine the volume of the base (#V_b#) needed to titrate the acid.

Assuming that the acid and the base are both monoprotic, such as: #HCl# and #NaOH#.

In here we can say: #n_(H^+)=n_(OH^(-))#

Since the relationship between the number of mole and molarity is:

#n=MxxV#, then we can say:

#M_axxV_a=M_bxxV_b#

Thus, the volume of the base needed to titrate the acid is:

#V_b=(M_axxV_a)/(M_b)#

Here is a complete lab demonstration on how to carry an acid-base titration in the lab along with the calculations thereafter:
Lab Demonstration | Acid - Base Titration.

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