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The sample is placed in a sealed capillary and heated up to the melting.
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∙ 8y ago
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Why do you use a new capillary tube for melting point determination each time?
It is not easy to be cleaned inside.
How you can determine the melting point of a compound using capillary tubes and a digital melting point apparatus that need to be calibrated each time of use?
Melting points are ranges usually. It starts when the first crystal of the substance being tested melts and ends when the last crystal melts. Therefore the smallest sample possible and the slowest rate of heating will give the most accurate melting point.
The temperature at which a solid melts is called?
melting point
What is difference between melting point and drop melting point?
No basic Difference between melting point and Drop point.
What becomes solid above the melting point?
assuming it is its own melting point NOTHING which is why its a MELTING point
What steps can you take to determine the melting point of a substance that sublimes before it melts?
In such cases the melting point determination must be performed in a sealed capillary tube to avoid loss of sample. This can be achieved by heating the open end of the capillary tube, and with tweezers forcing it shut.
Which physical properties is not affected by an increase in intermolecular forces?
The correct answers are: Capillary attraction; Melting point; and Heat of vaporization. Stronger intermolecular forces increase capillary attraction, melting point, and the heat of vaporization. They have no bearing on conductivity and hardness.A.HardnessB.ConductivityC.Capillary attractionD.Melting pointE.Heat of vaporization
Why do you use a new capillary tube for melting point determination each time?
It is not easy to be cleaned inside.
Why is it important to pack the sample tightly in the melting point capillary?
If left loose, the compound will be heated unevenly.
Why can't we reuse a capillary tube to determine the melting point for a second time?
ur muff cabbage
How you can determine the melting point of a compound using capillary tubes and a digital melting point apparatus that need to be calibrated each time of use?
Melting points are ranges usually. It starts when the first crystal of the substance being tested melts and ends when the last crystal melts. Therefore the smallest sample possible and the slowest rate of heating will give the most accurate melting point.
What do you call the temperature at which a solid changes to a liquid?
This is the melting point.
Which term is defined as the temperature at which a substance changes from a solid to a liquid state?
melting point
The temperature at which a solid melts is called?
melting point
What is difference between melting point and drop melting point?
No basic Difference between melting point and Drop point.
What becomes solid above the melting point?
assuming it is its own melting point NOTHING which is why its a MELTING point
Why is it important to pack the sublimate uniformly?
The melting point sample capillary tube has to be packed efficiently and uniformly, because air spaces can cause nonuniform heat transfer within the tube. This can inconsistency, with some parts of the sample melting before others, which results in poor reproducibility. A uniformly packed tube will melt consistently and evenly to give a sharp, reproducible melting point determination.
