To determine the purity of a sample of aspirin using the melting point determination technique, follow these steps:1. Obtain a sample of aspirin and prepare a small amount of it for testing. Crush the aspirin into a fine powder using a mortar and pestle.2. Determine the expected melting point range for pure aspirin. The melting point of pure aspirin is typically between 138C and 140C.3. Set up a melting point apparatus, which typically consists of a heating block or oil bath, a thermometer, and a capillary tube.4. Fill the capillary tube with the powdered aspirin sample by tapping the open end of the tube into the powder. Ensure that the sample is tightly packed in the bottom of the tube.5. Place the capillary tube in the melting point apparatus, ensuring that the sample is in contact with the heating block or oil bath and that the thermometer is positioned correctly.6. Slowly heat the apparatus and observe the temperature at which the aspirin sample begins to melt. Record the temperature range over which the sample melts completely.7. Compare the observed melting point range of the aspirin sample to the expected melting point range for pure aspirin 138C to 140C . If the observed melting point is within the expected range, the sample is likely pure. If the observed melting point is lower than the expected range, the sample may be impure.Possible sources of error in the experiment and ways to minimize them:1. Contamination of the sample: Ensure that all glassware and equipment are clean and free of contaminants before use. Wear gloves to prevent contamination from skin oils.2. Inaccurate thermometer: Calibrate the thermometer before use to ensure accurate temperature readings.3. Uneven heating: Heat the apparatus slowly and evenly to prevent localized overheating, which could cause the sample to melt prematurely.4. Insufficient sample size: Use an adequate amount of sample to ensure accurate melting point determination. Too little sample may result in an inaccurate melting point reading.5. Imprecise packing of the sample: Ensure that the sample is tightly packed in the capillary tube to prevent air pockets, which could affect the melting point determination.By addressing these potential sources of error, you can improve the accuracy of your melting point determination and more confidently assess the purity of your aspirin sample.