compare your recrystalized asa melting point results to the literature melting point provided. Is your recrystalized asa pure? circle yes or no and then explain in terms of melting point and the range.
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Look up the accepted melting point for aspirin (acetylsalicylic acid) in either the Merck Index or the CRC or the internet. Prepare a very small table with this accepted melting point (use a citation to show where you got the value), your experimental melting range for crude aspirin, and your experimental melting point range for recrystallized aspirin. Consider what this data says about the purity of an aspirin sample. Why do you think may cause discrepancy between an experimental sample of aspirin and a recrystallized version? How would that show up in the melting point of Aspirin?
Adi S.
Based on the relationship between melting point and the purity of a compound, one would expect to find a higher final melting temperature for purified aspirin compared to impure aspirin. The melting point range of purified aspirin should be slightly greater than that of impure aspirin. The equation # IIuC / NaOH added TCaCII Mlask during the titration of aspirin does not affect the calculation for % purity. The types of testing that can be used to distinguish between different types of commercial aspirin include titration to determine purity, comparison of final melting temperatures, and comparison of melting point ranges. If the melting range of recrystallized aspirin is 93.5-95.0, and the aspirin showed a melting range of 98.0-106.0 before recrystallization, it indicates that the recrystallized aspirin is impure or measured inaccurately because the final melting temperature is lower than that of the original impure sample.
Sri K.
Describe what your experimentally determined melting point (range) for the aspirin tells you about its purity and it compares to the known melting point for this compound. If the melting points are notably different, explain why. our sample melting point is 92.3 - 95.6 °C
Qbs E.
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