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a) There are two types of impurities that can contaminate a sample.What are they? How do they affect the observed melting points?

b) You have synthesized a new compound one which has never beenprepared. How would you determine its mp? What precautions couldyou take to insure that it is as accurate as possible?

c) You have a sample of an unknown substance, although you thinkyou know its identity. How could you establish whether or not thematerial is what you suspect?

d) Why shouldn't you use a sample that has been melted andresolidified to confirm a melting point?

e) A sample of an unknown compound has an melting point of145-154C. What conclusions would you draw? What actions would youtake?

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