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What is the effect of incomplete drying on melting point determination?
Ivihamad
The melting point will be lowered and broadened.
Incomplete drying of a sample may result in the presence of impurities. When impurities remain present in a sample, the melting point is both lowered and broadened. For example, if the normal mp of a substance is 104C - 106C, an improperly dried substance may contain impurities thus lowering and broadening the melting point range to something like 85C - 97C. (Note: these numbers are just arbitrarily chosen for the purpose of the example).
Wiki User
∙ 13y ago
Anonymous
Wiki User
∙ 15y agoThe incomplete drying of a compound after recrystallization could have a major effect on the melting point of that compound. Liquid aids in the transference of heat due to the greater density of water as opposed to air. Water for example causes the loss of heat twenty times faster than air. As such a wet compound will melt faster than one that is totally dry.
Wiki User
∙ 13y agono
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