Podcast
Questions and Answers
What is the initial appearance of the solution when the sugar solution is mixed with ammonium molybdate and glacial acetic acid?
What is the initial appearance of the solution when the sugar solution is mixed with ammonium molybdate and glacial acetic acid?
Why is it important to avoid prolonged heating during the descriptive test?
Why is it important to avoid prolonged heating during the descriptive test?
What color transition is observed during the test after adding the reagents?
What color transition is observed during the test after adding the reagents?
What might happen if sucrose decomposes during the test?
What might happen if sucrose decomposes during the test?
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What is the purpose of adding glacial acetic acid in the procedure?
What is the purpose of adding glacial acetic acid in the procedure?
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Study Notes
Qualitative Test for Sucrose
- Reagent: Sucrose, Sucrose solution, Ammonium Molybdate, Glacial Acetic Acid
- Procedure: Mix the given solution of sucrose, ammonium molybdate, and a few drops of glacial acetic acid.
- Observation: A colorless, clear solution turns light blue first, then to a deep blue color.
- Explanation: The reaction needs to be done quickly; otherwise, sucrose decomposes into fructose, which gives a positive reaction, making the procedure ineffective.
- Conclusion: The test verifies the presence of Sucrose.
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Description
This quiz focuses on the qualitative test for sucrose, detailing the reagents needed and the procedural steps involved. It also covers the observations and the explanation for the color change during the reaction. Test your knowledge on identifying sucrose in a solution and the importance of timely execution of the test.
