Question

you use in order to prepare me vulli! 16.30 A friend of yours has performed three titrations: strong acid with a strong base, weak acid with a strong base, and weak base with a strong acid. He hands you the three titration curves, saying he has forgotten which is which. What attributes of the curves would you look at to identify each curve correctly?

How to solve this?

Answer 1

There were the three titrations carried out:

Case 1. Strong acid with strong base (Strong acid reacts with a strong base to form a neutral solution of pH = 7 at equivalence point.)

Case 2. Weak acid with a strong base (Weak acid reacts with a strong base to form a basic solution of pH > 7 at equivalence point.)

Case 3. Weak base with a strong acid (Weak base reacts with a strong acid to form an acidic solution of pH < 7 at equivalence point.)

First try to identify the three titration curves based on the above concept.

Secondly,

If we compare the three curves, we found that the curve (pH vs Volume of titrant) start from top side (at pH > 7) for case 3 (Weak base with a strong acid), whereas the curve (pH vs Volume of titrant) start from bottom side (pH < 7) for case 1 as well as for case 2. If you compare case 1 curve with case 2 curve you found that It start from the less pH value for case 1 ( since acid is strong) in comparison to case 2.

The typical curve for case 1 and case 2:

pH of the "Analyte Solution ºf Stronauid- stress bus Volume of Titrant Added

The typical curve for case 3:

+ EQUIVALENCE POINT 5 30 354 पर VOLUME OF HE Cml)