4. When performing a melting point on 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 133.0-133.5°C. The other sample was 10 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!)(Hint: at what temperature would 1g of ice start melting at? At what temperature would 10g of ice start melting at?)

4. When performing a melting point on 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 133.0-133.5°C. The other sample was 10 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!)(Hint: at what temperature would 1g of ice start melting at? At what temperature would 10g of ice start melting at?)

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter9: Liquids And Solids

Section: Chapter Questions

Problem 18QAP: Consider the phase diagram of the compound in Problem 17 to answer the following questions. (a) What...

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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)
When recrystalizing an aspirin sample the hot solution cooled to room temperature and no crystals appeared, so the flask was placed in Ice water. A large amount of solid appeared however the product was contaminated with impurities. explain.
2. Defend or refute: If two different compoundshave identical melting points, melting point analysis can be used to determine if thetwo compoundsare identical or different.
9)Who measures melting points?
ali 83% ppun21@ole. COR Melting Point Ranking Highest Melting Point CaCl2 2. KI PCI3 CH4 HO HN Cl2 4 VIEW SOLUTION C TRY AGAIN 06/20 2 O v Apnop 1,95
What effect does the presence of impurity have on the melting point?
Aromatic compound naphthalene melts sharply at 79–81 °C. The melting range will be significantly depressed when very small amounts of impurities are present. Investigate the structure of naphthalene and propose an explanation of why very minor impurities have a very significantly disrupt formation of crystals.
is a melting point alone sufficient to idenitfy a compound? why or why not?
24 Which substance would melt first and why: CH₂OH or C₂H₂? Which substance would melt last and why: C₁₂H₁O₂(OH), or BaCl,?
11. Melting point temperatures are frequently used to help identify unknown solids and determine their purity. How would the melting point of a pure solid sample compare to that of the same solid contaminated by a solid impurity? Explain.
4. For this question use the following multiple choice answers: (A) (i) (ii) (iii) (iii) (i) (ii) < (a) Rank in increasing order of increasing boiling point OH A BC DE F OH (i) (ii) (iii) (b) Rank the following compounds in order of increasing boiling point: НО OH OH ABC DE F Но (i) (ii) (iii) (c) Rank in increasing order of number of unpaired electrons (i) Ne3+ (ii) Fe3+ (iii) Ga³+ A BC DE F (d) Rank the following compounds in order of increasing lattice energy: (i) Al(NO:)3 (ii) Li2S (iii) LiBr A BC DE F (e) Rank the INTERIOR F-X-F angle in increasing order (X is the central atom): (i) PF6 (ii) SİF4 (ii) KRF2 A BC DE F V V v v y v
wwnorton.com/108921 85% 10/11/21 SCORE ppun21@ole.augie.edu Highest Melting Point CaCl2 NH,OH PCI3 KI Cl2 CH4 SUBMIT ANSWER 4 VIEW SOLUTION 1 3 OF 20 QUESTIONS COMPLETED 56°F Cloudy ^ 10 earch DELL 1. 2.

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