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Questions and Answers
What is the oxidizing agent in the determination of peroxides in volatile oil?
What is the oxidizing agent in the determination of peroxides in volatile oil?
- KI
- HCl
- Na2S2O3
- Ascaridole (correct)
Why is cooling essential in the first step of the procedure?
Why is cooling essential in the first step of the procedure?
- To prevent oxidation of KI to I2 by light
- To allow completion of the reaction
- Because the reaction is vigorous at room temperature (correct)
- To prevent volatilization of I2
What is the purpose of adding starch solution in the titration?
What is the purpose of adding starch solution in the titration?
- To liberate I2 from KI
- To neutralize the acid medium
- As an indicator near the end point (correct)
- To prevent oxidation of KI to I2 by light
Why is the mixture set aside in the dark for 5 minutes?
Why is the mixture set aside in the dark for 5 minutes?
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What is the purpose of adding 20ml of H2O in the blank titration?
What is the purpose of adding 20ml of H2O in the blank titration?
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What is the role of glacial acetic acid in the procedure?
What is the role of glacial acetic acid in the procedure?
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