what is the color changes if FeCl3 added with pure aspirin?
FeCl3 will not react with aspirin. It will, however, react with salicylic acid, which is used to synthesize aspirin. Thus by adding an aqueous FeCl3 solution to a sample of aspirin is a good way to see if there is any unreacted salicylic acid. A purple colour is an indication of salicylic acid. A sample of pure aspirin should not exhibit a colour change.
Answer
When FeCl3 is added to pure aspirin, a chemical reaction occurs which results in a color change. The color of the solution changes from colorless to purple. This reaction is known as the FeCl3 test or the iron chloride test, which is commonly used as a screening test to detect the presence of salicylates, such as aspirin. The purple color formation is indicative of the presence of salicylates in the solution.
To understand what color changes occur when FeCl3 is added to pure aspirin, we can follow a scientific method to find the answer:
1. **Research**: Start by researching the properties of FeCl3 (ferric chloride) and pure aspirin (acetylsalicylic acid). Look for any relevant information regarding their chemical interactions or reactions.
2. **Hypothesis**: Based on our initial research, we can form a hypothesis about the expected color changes. However, it is important to note that the hypothesis may not always be correct, which is why we perform experiments for confirmation.
3. **Experiment**: Set up a controlled experiment by taking a small amount of pure aspirin and dissolving it in a suitable solvent, such as ethanol or water. Then, prepare a solution of FeCl3 in another container. Gradually add a few drops of the FeCl3 solution to the dissolved aspirin and closely observe any color changes that occur.
4. **Observation**: Pay attention to any observable changes in the solution's color as you add the FeCl3. Take note of any shifts from the original color of pure aspirin.
5. **Comparison**: Compare the resulting color of the solution after the FeCl3 addition to the original color of pure aspirin. Note any differences or similarities.
6. **Analysis**: Based on your observations, analyze the color changes. If there is a noticeable change in color, describe it in detail and consider researching the chemical reaction or complex formation responsible for the observed color change.
It is important to note that while this method provides a general approach to finding an answer, the specific color changes resulting from the reaction between FeCl3 and pure aspirin may require further research and experimentation.