Chemistry - Complete Pblock- Question with Solution | TestHub
ChemistryComplete Pblock-p-Block 13,14Medium2 minQB
ChemistryMediummultiple choice
Which of the following chemical species is/are used for the satisfactorily titration of boric acid with NaOH by using of phenolphthalein indicator to obtain sharp end point.
Options:(select one or more)
Answer:
A, B, C
Solution:
Boric acid (H₃BO₃) is a very weak Lewis acid and cannot be titrated sharply with NaOH using phenolphthalein. However, it forms a stable complex with polyhydroxy compounds like sugar, mannitol, and glycerol, which increases its acidity and allows sharp endpoint detection. These compounds form borate complexes, making boric acid behave as a stronger acid during titration. Carbon tetrachloride (CCl₄) does not form such complexes, so it is not used.
Stream:JEESubject:ChemistryTopic:Complete Pblock-Subtopic:p-Block 13,14
⏱ 2mℹ️ Source: QB
Doubts & Discussion
Loading discussions...