REDOX VOLUMENTRIC ANALYSIS

Redox titration

_____ is a volumetric analysis technique that involves the transfer of electrons between reacting species, typically involving an oxidizing agent and a reducing agent.

potassium permanganate (KMnO₄); hydrogen peroxide (H₂O₂); sulfuric acid (H₂SO₄).

________ , a strong oxidizer, reacts with _______, a reducing agent, in an acidic medium provided by _____

Mn²⁺

the permanganate ions being reduced from Mn⁷⁺ to ____

oxygen gas (O₂).

hydrogen peroxide being oxidized to _____

purpe color

The deep ____ of KMnO₄ fades to colorless Mn²⁺

KMnO₄

with the endpoint of the titration indicated by the first permanent pink coloration in the solution, signifying a slight excess of unreacted ___

hydrogen peroxide

This titration is particularly useful for quantifying ______ because the reaction is rapid

stoichiometrically; KMnO₄

_____ well defined, and does not require an external indicator due to the self-indicating nature of _____

acidic media

Understanding the redox behavior of these substances also reinforces key concepts such as oxidation states, electron transfer, and the role of ____ in facilitating redox reactions.

accuracy and precision

The controlled use of limited volumes emphasizes the importance of ____ in analytical techniques

faint pink color

The pink color of KMnO4 disappears as it reacts, and the endpoint is marked by the persistence of a _____

KMnO4

Rinse the burette with ___ solution and fill it

10.00 mL; H2O2

Pipette _____ of ____ solution into an Erlenmeyer flask

10.00 mL; 1 M H2S04

Add ____ mL of _____ to acidify the solution

faint pink

Titrate with KMnO4 while swirling until a ____ color persists for 30 seconds.