1- the determination of melting point was carried out with less than 0.5 cm of c

Question

1- the determination of melting point was carried out with less than 0.5 cm of compound in the capillary tube. How would this effect the melting point? 2- why was it necessary to allow the Mel-Temp to cool bu at least 20 C before performing the second determination of the melting point of your recrystallized solid? 1- the determination of melting point was carried out with less than 0.5 cm of compound in the capillary tube. How would this effect the melting point? 2- why was it necessary to allow the Mel-Temp to cool bu at least 20 C before performing the second determination of the melting point of your recrystallized solid? 2- why was it necessary to allow the Mel-Temp to cool bu at least 20 C before performing the second determination of the melting point of your recrystallized solid?

Explanation / Answer

1- the determination of melting point was carried out with less than 0.5 cm of compound in the capillary tube. How would this effect the melting point?

Generally in the determination of melting point there are 0.2 t0 0.3 cm of compound will be carry in the capillary tube. When we take higher volume of compound and it will (majority of the time) require higher temperatures to melt.

Then the range of melting point will be broader.

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