Question #61507
7 Freezing points are difficult to determine because of the phenomenon of ___________
Impurities
Refridgeration
Supercooling
None of the above
8 What is the meaning of "oiling out" during recrystallization?
Compound melts before dissolving
Compound dissolves before melting
Compound turns to oil
Compound sublimes
9 Insoluble impurities have ______________ effect on the melting pont.
little
no
maximum
minimum
1
Expert's answer
2016-08-31T11:25:03-0400
7. Supercooling
8. Compound turns to oil
9. Little

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