حله و لك ?? Discussion1- If you were given a known substance for the melting point determinationhow could you prove it to be the specific compound and not another

Solution: We know in qualitative analysis most of the compounds are confirmed from their physical…

Answered: how could you prove it to be the…

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how could you prove it to be the specific compound and not another

Introductory Chemistry For Today

8th Edition

ISBN:9781285644561

Author:Seager

Publisher:Seager

Chapter7: Solutions And Colloids

Section: Chapter Questions

Problem 7.14E

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9)Who measures melting points?
8)Why measuring melting points?
Small explanation please.
4. When performing a melting point on a solid compound using a melting point apparatus, two melting point determinations were made. One sample, which was 1 mm in height in the capillary, possessed a melting point of 200.0-200.5°C. The other sample was 25 mm in height. What would you expect the approximate melting point to be for this sample, assuming identical heating rates of 1°/min? (Hint: heat is applied from the bottom of the sample) (Give an actual numerical approximation!) 5. For the same solid compound as the question above, if the 1 mm sample was heated at 60° per minute on a melting point apparatus, what would you expect for an approximate melting point? (note that at this heating rate, the sample will melt rather quickly, but again give an actual numerical approximation)
3. A student is trying to identify an unknown solid based on its melting point. She noted that the compound began to melt at 172°C and finished melting at 177°C. Knowing it is possible for there to be impurities in the sample, is this compound more likely to be camphor or hydroquinone. Explain your reasoning. 4. A young chemist has synthesized what he believed to be acetaminophen. He measured the melting point of this newly formed compound to be 163-178°C. If the literature value for the melting point of acetaminophen = 169-170.5°C, would the young chemist be wise to consume this product for headache relief? Why or why not?
is a melting point alone sufficient to idenitfy a compound? why or why not?
Chemistry 5. You melt the substance and de-coloration occurs. Unfortunately, you weren’t paying attention and miss the melting point. Should you start over or re-melt it? Or both are options ‘okay’? 6. When measuring the melting point of a substance, it suddenly disappears. What has happened? Can you still measure the melting point? If so, how? 7. We should not re-use a sample in a capillary tube for melting point measurement. Why not? 8. It takes significant amount of time for the melting point apparatus to cool down before next measurement if your new sample has a lower melting point than your previous one. What can you do to reduce this time in between measurements when many samples of different melting points are used?
Having too much sample can cause an inaccurate melting point under these Sir how will the observed melting point compare with the true melting point ?
IXL Recognize sc x Terms of Use Classes https://www.oncourseconnect.com/assessment/1651875/41774aa4-b498-c1c9-30b9-e734c5 CHEMISTRY BENCHMARK TEST 01 CHEMISTRY I 12-3 (THOMAS WILLIAMS, ID: 12390719) Testing of a sample of matter shows that it has a single melting point of 1,453°C and a single boiling point of 2,732°C. This data suggests that the sample is a a nonmetal. b a metal, ©a hydrocarbon. O a mixture of ionic compounds. D. Seed 14320410 https://wweoncou econnect.com/assesmen/151675-41774ad-4-ce 11 Type here to search
A) Use the table to answer the question. Substance Boiling Point (°C) acetone 56 turpentine 160 propane -43 glycerin 290 In which substance are the electrostatic forces between molecules the strongest? (1 point) glycerin acetone O turpentine propane 1/2 https://www.connexus.com/assessments/learnosity.aspx?idAssessment=1867918&idWebuser3D3145612&idSection=1579953&idHtmllet3D12382715&cl...
Arrange in the correct order. 1. Distillation 2. Reflux Question 1 options: It is a process in which liquid is heated at its boiling point, evaporated and then condensed back into a separate container It is a process in which the condensate is heated at its boiling point and returned back to the liquid that the vapours originally came from
Why do impure compounds normally have a lower melting point than the pure substance?