sources of errors in determining melting point
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Answer:
Three sources of error that may have occurred during this lab include Essay. In this lab, it was observed that pure compounds have a sharp, narrow melting range, while impurities caused the melting point range to become relatively lower and broader. The unknown sample was identified as trans-cinnamic acid.
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Explanation:
Answer:
Given its simplicity, melting point analysis is fairly precise and specific. Melting point analysis does have a high degree of specificity due to the fact that a substance's melting point is a distinct physical property. Having a list of potential chemicals in mind, however, can significantly narrow down the choices because many substances have similar melting points.
Additionally, the thermometers used are accurate. However, because the melting point is also affected by pressure, experimental results may differ from those in the literature, particularly in extreme environments, such as high-altitude locations. The experimenter's visual detection of melting is the biggest source of error. The amount of error that is introduced at this step can be reduced by controlling the rate of change and running multiple trials.
Melting point analysis has some drawbacks, as with any analysis. Melting point analysis is not possible if the sample is not solid. Additionally, analysis harms the sample. There are now more precise and specific qualitative identification analysis methods available, but they typically cost a lot more. Additionally, quantitative purity analyses of samples containing more than one solute are not possible.
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