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?
- Cloudy yellow
- Light blue
- Transparent white (correct)
- Dark blue
Why is it important to avoid prolonged heating during the descriptive test?
Why is it important to avoid prolonged heating during the descriptive test?
- It allows for a clearer observation of the results.
- It prevents the decomposition of sucrose into fructose. (correct)
- It accelerates the precipitation of ammonium molybdate.
- It enhances the color change reaction.
What color transition is observed during the test after adding the reagents?
What color transition is observed during the test after adding the reagents?
- Dark red to light pink
- Light blue to dark blue (correct)
- Transparent white to cloudy blue to dark blue
- Yellow to orange to red
What might happen if sucrose decomposes during the test?
What might happen if sucrose decomposes during the test?
What is the purpose of adding glacial acetic acid in the procedure?
What is the purpose of adding glacial acetic acid in the procedure?
Flashcards
Sugar solution test
Sugar solution test
A test used to detect the presence of fructose in a sugar solution using ammonium molybdate and glacial acetic acid.
Ammonium molybdate
Ammonium molybdate
A chemical agent used in the sugar solution test to detect fructose.
Glacial acetic acid
Glacial acetic acid
A chemical agent used to help in the sugar solution test.
Positive Result Color Change
Positive Result Color Change
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Short Heating Duration
Short Heating Duration
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Test Specificity
Test Specificity
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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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