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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 else can I help you with?
Who has higher melting point Pure or Impure Substance?
A pure substance typically has a higher melting point than an impure substance. Impurities disrupt the regular arrangement of particles in the substance, making it more difficult for them to overcome the intermolecular forces and transition from solid to liquid state. This results in a lower melting point for impure substances.
Is the melting point of impure water lower or higher than freezing point?
The melting point of impure water is lower than the freezing point. Impurities disrupt the crystalline structure of water, making it harder for the water molecules to align and freeze. This results in the impure water needing to be cooled to a lower temperature before it freezes.
What is the melting point of impure sulfanilamide?
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.
How is the melting point of an impure compound expected to change with recrystallization?
The melting point of an impure compound is expected to decrease with recrystallization. This is because impurities disrupt the crystal lattice structure, causing a broader melting point range. Recrystallization removes impurities, resulting in a purer compound with a higher melting point.
How does the melting point of the crude sample compare with that of the purified sample?
An impure sample will have a lower melting point, and will also have wider melting point range than that of a pure sample of the same substance. a sharp melting point range can also indicate a eutectic 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.
What will melt faster pure or impure naphthalene?
Impure naphthalene will typically melt faster than pure naphthalene. The impurities present in impure naphthalene lower its melting point, making it easier for the solid to convert into a liquid state at a lower temperature.
Who has higher melting point Pure or Impure Substance?
A pure substance typically has a higher melting point than an impure substance. Impurities disrupt the regular arrangement of particles in the substance, making it more difficult for them to overcome the intermolecular forces and transition from solid to liquid state. This results in a lower melting point for impure substances.
Is the melting point of impure water lower or higher than freezing point?
The melting point of impure water is lower than the freezing point. Impurities disrupt the crystalline structure of water, making it harder for the water molecules to align and freeze. This results in the impure water needing to be cooled to a lower temperature before it freezes.
Does impure and pure chemicals melt at the same temperature?
No, impure chemicals do not melt at the same temperature as pure chemicals. Impurities can disrupt the crystal lattice structure of a substance, causing the melting point to decrease or broaden. This results in impure substances melting at lower temperatures compared to their pure counterparts.
What is the melting point of impure sulfanilamide?
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.
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 of the impure and recrystallized samples of vanillin?
The melting point is an indication of purity.
How is the melting point of an impure compound expected to change with recrystallization?
The melting point of an impure compound is expected to decrease with recrystallization. This is because impurities disrupt the crystal lattice structure, causing a broader melting point range. Recrystallization removes impurities, resulting in a purer compound with a higher melting point.
What happens to the melting point of urea and cinnamic acid when mixed?
The melting point will be reduced because an impure substance is not held together as strongly as a pure substance therefore it takes less energy to break the bonds or attractive forces holding the impure substance together.
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.
How is the melting of an impure compound expected to change with recrystallization?
During recrystallization, impurities are removed as the compound is dissolved and then slowly cooled to allow for the formation of pure crystals. As a result, the melting point of the compound should increase after recrystallization because the presence of impurities lowers the melting point of the compound.
