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
    Crystallization Process Quiz
    9 questions
    Evaporation and Crystallization Methods
    12 questions
    Use Quizgecko on...
    Browser
    Browser