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Chemistry
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1. Why should the melting point sample be finely powdered?

2. How can melting point be used to determine the purity of a substance?

3. What type of error might be expected if the melting point capillaries tubes are not thin-walled?

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Hubert Koch
Hubert KochLv2
30 Sep 2019

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Related questions

If an insoluble impurity, such as sodium sulfate, was present in sample, would the observed melting point of the sample be too low, too high, or would be no effect. Explain your reasoning.

Explain in detail why the melting point sample should be finely powdered and packed tightly into the cappliary tube.

Strickly speaking, why is it incorrect to speak of a melting point?

A student has an unknown with an observed melting point of 82..5 degrees Celisus -86 degrees Celisus. Is it Compound with a reported melting point of 83.5 degrees Celisus -84 degress Celisus, Comound Y with a repored melting point of 88.5 degree Celisus-89 degrees Celisus or Compound Z with a reported melting point of 82 degrees Celisus -83 degrees Celisus. Explain your reasoning.

An unknown compound is suspected to be acetanilide (mp 113.5 -114 degrees Celisus. What should happen to the melting point if the unknow were mixed with (a) an equal quantity of pure acetanilide? (b). an equality of benzoic acid?

Three test tubes, labeled A, B, C, contain substances with approximately the same melting points. Describe in detail how you could prove that the test tubes contain three different substances using only melting point tests.



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