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19 Nov 2019
Obtain sample of two compounds with the same mp's. Mix approximately equal portions of each compound, and grind them together. Determine the mixture melting point of this sample. Note any differences between this determination and the previous ones. Record the values you observed in this experiment on the proper form, and turn it in to your instructor. There are two types of impurities that can contaminate a sample. What are they? How do they affect the observed melting points? You have synthesized a new compound; one which has never been prepared. How would you determine its mp? What precautions could you take to ensure that it is as accurate as possible? Based on the effect of impurities, how would you explain the results you got from the mixture melting point experiment? You have a sample of an unknown substance, although you think you know its identity. How could you establish whether or not the material is what you suspect? If you heat your sample too rapidly, the mp you record will be incorrect. Would you expect the value to be too high or too low? Why shouldn't you use a sample that has been melted and solidified to confirm a melting point? A sample of an unknown compound has a mp of 145-154^degreec. What conclusions would you draw? What action would you take? How can you determine if a compound is decomposing rather than malting? Under what circumstances could a mixture of two compounds give a sharp melting point?
Obtain sample of two compounds with the same mp's. Mix approximately equal portions of each compound, and grind them together. Determine the mixture melting point of this sample. Note any differences between this determination and the previous ones. Record the values you observed in this experiment on the proper form, and turn it in to your instructor. There are two types of impurities that can contaminate a sample. What are they? How do they affect the observed melting points? You have synthesized a new compound; one which has never been prepared. How would you determine its mp? What precautions could you take to ensure that it is as accurate as possible? Based on the effect of impurities, how would you explain the results you got from the mixture melting point experiment? You have a sample of an unknown substance, although you think you know its identity. How could you establish whether or not the material is what you suspect? If you heat your sample too rapidly, the mp you record will be incorrect. Would you expect the value to be too high or too low? Why shouldn't you use a sample that has been melted and solidified to confirm a melting point? A sample of an unknown compound has a mp of 145-154^degreec. What conclusions would you draw? What action would you take? How can you determine if a compound is decomposing rather than malting? Under what circumstances could a mixture of two compounds give a sharp melting point?
Sixta KovacekLv2
21 May 2019