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How does pH affect titration?

seo-qna
Last updated date: 13th Jun 2024
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Answer
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Hint: The pH plays a very important role in the titration process. Titration is used to determine the unknown concentration of the solution by adding the known concentration of the solution, the equivalence point tells that product is formed.

Complete step by step answer:
The pH of the product formed in the titration plays a very important role to determine the nature of the compound.
The titration is a quantitative method used to determine the concentration of the acid component or base component by adding with the known concentration of acid or base.
The solution which is added to the known concentration solution is known as the titrant and the solution with the unknown concentration is known as analyte.
During the titration, the point at which the titrant added is enough to neutralize the analyte solution is known as the equivalence point. At the equivalence point the number of moles of acid is equal to the number of moles of product.
The pH of the solution helps to determine the equivalence point.
In acid-base titration using a strong acid and strong base the acids are neutralized by adding base and as a result salt is formed by eliminating the water. The pH of the neutral salt is 7. When the pH is 7 it can be assumed that equivalence point is reached.

Note:
It is not necessary that the pH of the salt is always 7. If the titration is performed between a weak base and strong acid, the salt formed will be acidic salt. The pH of the salt solution will be less than 7. Example: Ammonia reacting with hydrochloric acid to form ammonium chloride. When the titration is performed using a strong base and weak acid, the salt formed will be basic salt and the pH will be more than 7. Example: Potassium hydroxide and acetic acid to form potassium acetate.