Q1. What will be formed when propanone reacted with sodium hydrogensulphite?
There is white precipitate is the resulting solution . Is it sodium carbonate?
Q2. What are the difference in the products bewteen the reaction of ethanal and propanone reacting with 2,4-dinitrophenylhydrazine?
The resulting solution are both yellow and orange precipitate is formed . It seems that there are some different in the shape of precipitate.
Q3. What is the polymer formed when ethanal reacted with sodium hydroxide solution?
Q4. What will be formed when ethanal reacted with acidified dichromate(VI) ?
Why is the resulting solution green ?
Q5. What will be formed when propanone reacted with Fehling's solution?The resulting solution is yellow and green precipitate is formed . Is that precipitate copper carbonate?
Q6.What are the difference in products between the reaction of ethanal and propanone reacting with iodine solution and sodium hydroxide solution ?The resulting solution of ethanal one is orange while the other is very pale yellow or nearly colorless.Both of them give yellow precipitate . Are the precipitates the same?
Q7. Which reagent should i use to test for carbonyl compound?
A1. When propanone reacts with sodium hydrogensulphite, it forms a compound called sodium bisulphite addition product. This compound is a white precipitate and not sodium carbonate. To determine the formation of sodium bisulphite addition product, you can perform a simple experiment. Take a small amount of propanone and add it to a test tube containing sodium hydrogensulphite. Mix the two substances thoroughly and observe if a white precipitate forms in the resulting solution. If a white precipitate does form, it confirms the presence of the sodium bisulphite addition product.
A2. The reaction of both ethanal and propanone with 2,4-dinitrophenylhydrazine results in the formation of similar yellow precipitates. However, there may be some differences in the shape or appearance of the precipitates. To understand the exact differences, you can perform the reaction separately for ethanal and propanone with 2,4-dinitrophenylhydrazine. Observe the formed precipitates in both cases and compare them. Note any variations in color, shape, or other observable properties to identify the differences between the two reactions.
A3. When ethanal reacts with sodium hydroxide solution, it forms a compound called sodium ethanoate. However, it does not form a polymer. To confirm the formation of sodium ethanoate, you can carry out the reaction yourself. Mix a small amount of ethanal with sodium hydroxide solution and observe any changes in the resulting mixture. If the mixture turns into a solution and does not show any sign of polymerization, it indicates the formation of sodium ethanoate.
A4. When ethanal reacts with acidified dichromate(VI), it forms a compound called ethanoic acid. The resulting solution is green due to the presence of chromium ions. Chromic ions exhibit green coloration, hence the green shade of the solution. To verify this reaction, you can perform it yourself. Mix ethanal with acidified dichromate(VI) solution and observe the color change in the resulting mixture. If the mixture turns green, it confirms the formation of ethanoic acid.
A5. When propanone reacts with Fehling's solution, the resulting solution forms a yellow color and a green precipitate. However, the precipitate is not copper carbonate. To determine the exact compound formed, you can perform the reaction yourself. Mix propanone with Fehling's solution and observe the color change and any precipitate formation. If a yellow color develops and a green precipitate is seen, it confirms the presence of a complex compound involving copper. Further chemical tests can be performed to identify the specific compound.
A6. When ethanal reacts with iodine solution and sodium hydroxide solution, different products are obtained. The resulting solution of ethanal turns orange, while the solution in the case of propanone shows a very pale yellow or nearly colorless appearance. Both reactions yield a yellow precipitate. To verify the differences between the precipitates, you can carry out the reactions separately. Compare the color and appearance of the precipitates formed in both cases to identify any variations.
A7. To test for carbonyl compounds, you can use reagents such as 2,4-dinitrophenylhydrazine or Fehling's solution. 2,4-dinitrophenylhydrazine forms a yellow precipitate when reacted with carbonyl compounds, while Fehling's solution forms a red precipitate. By performing a simple experiment with either of these reagents and observing the resulting color change or formation of a precipitate, you can determine the presence of carbonyl compounds.