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7.3.1: Solubility and Intermolecular Forces (Problems)

  • Page ID
    236763
  • PROBLEM \(\PageIndex{1}\)

    Suggest an explanation for the observations that ethanol, C2H5OH, is completely miscible with water and that ethanethiol, C2H5SH, is soluble only to the extent of 1.5 g per 100 mL of water.

    Answer

    The hydrogen bonds between water and C2H5OH are much stronger than the intermolecular attractions between water and C2H5SH.

    PROBLEM \(\PageIndex{2}\)

    Which of the following gases is expected to be most soluble in water? Explain your reasoning.

    1. CH4
    2. CCl4
    3. CHCl3
    Answer

    (c) CHCl3 is expected to be most soluble in water. Of the three gases, only this one is polar and thus capable of experiencing relatively strong dipole-dipole attraction to water molecules.

     

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