Crystallization Conditions and Packing Patterns
11 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the term used to describe different packing patterns of molecules in crystals?

  • Enantiomers
  • Stereoisomers
  • Polymorphic forms (correct)
  • Isomers

    • How are the two packing arrangements in Fig. 8.1 described in the text?

  • Enantiomers
  • Crystals with the same density
  • Polymorphic forms (correct)
  • Isomers

    • Why would the structure in Fig. 8.1a have a lower melting point than the structure in Fig. 8.1b?

  • It has more spaced out molecules (correct)
  • It has a more interwoven structure
  • It has natural break lines
  • It is more difficult to physically pull molecules off the structure

    • What would be the consequence of an attempt to mill the crystal structures in Fig. 8.1a and Fig. 8.1b?

    <p>Fig. 8.1a will break easily, Fig. 8.1b might not</p> Signup and view all the answers

    What term is used to describe crystals with the same mass of material occupying different volumes?

    <p>Polymorphic forms</p> Signup and view all the answers

    What term describes crystals with different packing patterns due to a change in crystallization conditions?

    <p>Polymorphic forms</p> Signup and view all the answers

    Why would the crystal structure in Fig. 8.1a have a lower melting point than the structure in Fig. 8.1b?

    <p>The molecules in Fig. 8.1a are more spaced out than those in Fig. 8.1b</p> Signup and view all the answers

    What might be the consequence of an attempt to mill the crystal structures in Fig. 8.1a and Fig. 8.1b?

    <p>Only the structure in Fig. 8.1a would break easily due to natural break lines</p> Signup and view all the answers

    What change in crystallization conditions could lead to molecules forming crystals with a different packing pattern?

    <p>A shift to a different solvent during crystallization</p> Signup and view all the answers

    What term is used to describe crystals with the same mass of material occupying different volumes?

    <p>Polymorphic forms</p> Signup and view all the answers

    Match the following with their descriptions:

    <p>Packing arrangements in Fig. 8.1a and Fig. 8.1b = Two crystal forms called polymorphic forms Molecules in Fig. 8.1a and Fig. 8.1b = More spaced out in Fig. 8.1a and more interwoven in Fig. 8.1b Melting point of the structure in Fig. 8.1a = Lower than the structure in Fig. 8.1b Consequence of an attempt to mill the crystal structures in Fig. 8.1a and Fig. 8.1b = Structure in Fig. 8.1a would break easily, whereas the structure in Fig. 8.1b may not break easily</p> Signup and view all the answers

    More Like This

    Crystallization
    1 questions

    Crystallization

    FlatteringKyanite avatar
    FlatteringKyanite
    Evaporation and Crystallization Methods
    12 questions

    Evaporation and Crystallization Methods

    FastestGrowingSard9353 avatar
    FastestGrowingSard9353
    Crystallization in Isolation and Purification of Solids
    40 questions

    Crystallization in Isolation and Purification of Solids

    PoignantCotangent avatar
    PoignantCotangent
    Material Science Quiz: Crystallization and Properties
    25 questions

    Material Science Quiz: Crystallization and Properties

    SolidRutherfordium avatar
    SolidRutherfordium
    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser