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Why can't we reuse a capillary tube to determine the melting point for a second time?
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∙ 12y ago
ur muff cabbage
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∙ 12y ago
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What is a capillary melting point?
The sample is placed in a sealed capillary and heated up to the melting.
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.
How do you determine the melting point of dibenzylideneacetone?
Get melting point apparatus; determine.
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.
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.
How does a substances melting point determine its state at room temperature?
If the melting point is under 20 oC the substance is a liquid.
What is hassium's melting point?
I have gone to 8 websites and it is UNKNOWN ----- It is impossible to determine the melting point of hassium with only some atoms !
How can you determine if a substances is a solid at room temperature?
Check the melting point of the substance. If the melting point is below room temperature, then the substance is liquid and if the melting point is above room temperature then it is solid.
What is important of melting point?
Knowing the melting point of a substance provides information to determine what the substance is if its unknown. If you are making a substance, checking the melting point will let you know if you have made what you set out to make, (because impurities can mess up the melting point)
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.
