NEETChemistryRedox Reactions
What is the purpose of adding starch to the solution during iodometry using Cu(II) as the oxidizing agent?
Options
- ATo make the solution more colorful.
- BTo stabilize the Cu 2 I 2 precipitate.
- CTo provide a visual indicator for the endpoint.
- DTo enhance the reaction between Cu2+ and I-.
Correct answer
C. To provide a visual indicator for the endpoint.
Step-by-step solution
Starch is added to the solution to act as an indicator. It forms a complex with iodine, resulting in an intense blue color, which serves as a visual indicator for the endpoint of the reaction.