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This question is rather ambiguous, as the amount of impurity would need to be known (i.e. is it 99% pure? 95%? 80%? etc). As the level of impurity rises however, the melting point (freezing point) will drop.
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Why is it important to determine the melting range of the impure and recrystallized sample of vanillin?
The melting point is an indication of purity.
Why is it important to determine the melting ranges for the impure and recrystallized samples of vanillin?
The melting point is an indication of purity.
Why is the melting point of impure water lower than the melting point of pure water plus how can this be explained?
the melting point of IMPURE water is lower because excess chemicals and sediments (and whatever else making it impure) get in the way of the water freezing directly by making it so that when the the water froze, it also had to freeze the sediments and chemicals (or else it wouldn't be frozen)
How is the melting point of an impure compound expected to change with recrystallization?
The test to see what can be done.
Who has higher melting point Pure or Impure Substance?
The melting point of an impure compound is almost *always* lower than that of a pure compound.
How is the melting of an impure compound expected to change with recrystallization?
The melting point of an impure compound will become closer to that of the actual melting point of the pure substance with recrystallization of your mixture.
If a substance is impure what will be the two effects on its melting point compared to the literature value?
the impurities will lower the melting point value.
When the observed melting point is less than the stanadr value what inference will you get?
The substance whose melting point is being observed is impure.
Why is it important to determine the melting ranges for the impure and recrystallized samples of vanillin?
The melting point is an indication of purity.
Why is it important to determine the melting range of the impure and recrystallized sample of vanillin?
The melting point is an indication of purity.
Why is it important to determine the melting ranges of the impure and recrystallized samples of vanillin?
The melting point is an indication of purity.
Why is the melting point of impure water lower than the melting point of pure water plus how can this be explained?
the melting point of IMPURE water is lower because excess chemicals and sediments (and whatever else making it impure) get in the way of the water freezing directly by making it so that when the the water froze, it also had to freeze the sediments and chemicals (or else it wouldn't be frozen)
What is purity criteria?
The criteria of purity of a compund isÊdetermined at it melting point.ÊA pure compound a definate melting point. While an impure substance has an indefinate melting point.
What will melt faster pure or impure naphthalene?
Remember that the more impure the lower the melting point.
Higher melting point than expected?
It is indeed possible for a substance to have a higher melting point than expected. This normally happens when the substance is impure.
How is the melting point of an impure compound expected to change with recrystallization?
The test to see what can be done.
Experiment for pure and impure naphthalene?
It is easily checked by melting point of Naphthalene, if it is pure its melting point is 79 Celsius otherwise less than 79 Celsius.
