Alfred Werner's Coordination Compounds
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Questions and Answers

Who was the first chemist to formulate ideas about the structures of coordination compounds?

  • Dmitri Mendeleev
  • Louis Pasteur
  • Alfred Werner (correct)
  • Marie Curie
  • What did Alfred Werner propose in relation to metal ions in coordination compounds?

  • Secondary valence only
  • Both primary and secondary valence (correct)
  • Primary valence only
  • Tertiary valence
  • How many primary valences do CoCl2 and PdCl2 have according to Alfred Werner?

  • CoCl2 - 4, PdCl2 - 4
  • CoCl2 - 1, PdCl2 - 1
  • CoCl2 - 3, PdCl2 - 2 (correct)
  • CoCl2 - 2, PdCl2 - 3
  • In Werner's experiments with cobalt(III) chloride and ammonia, what was observed when excess silver nitrate was added?

    <p>Some chloride ions precipitated as AgCl while some remained in solution</p> Signup and view all the answers

    How many moles of silver chloride (AgCl) are formed when reacting 1 mol of CoCl3.6NH3 (Yellow) according to the observations by Alfred Werner?

    <p>3 mol AgCl</p> Signup and view all the answers

    Based on Werner's theory, how many groups remain bonded to the cobalt ion during the reaction in coordination compounds?

    <p>Six groups</p> Signup and view all the answers

    According to Werner's theory of coordination compounds, what is the primary valence satisfied by?

    <p>Negative ions</p> Signup and view all the answers

    What term is used for compounds like [CoCl3.4NH3] which have the same empirical formula but different properties?

    <p>Isomers</p> Signup and view all the answers

    What is the secondary valence in coordination compounds according to Werner's theory?

    <p>Non-ionisable</p> Signup and view all the answers

    In the context of coordination compounds, what are coordination polyhedra?

    <p>Spatial arrangements around the metal ion</p> Signup and view all the answers

    Which geometrical shapes did Werner postulate as more common in coordination compounds of transition metals?

    <p>Octahedral, tetrahedral, square planar</p> Signup and view all the answers

    How do double salts differ from complex ions in terms of dissociation in water?

    <p>Double salts dissociate into simple ions, but complex ions do not dissociate</p> Signup and view all the answers

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