Water Structure and Hydrogen Bonding Quiz
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Questions and Answers

What enables water to form polar associations with other charged molecules?

  • Hydrogen bonds
  • Covalent bonds
  • Dipolarity (correct)
  • Ionic bonds
  • Why can water dissolve a large number of substances?

  • Due to its covalent bonding
  • As a result of hydrogen bonding (correct)
  • Because it is a non-polar molecule
  • From its high electronegativity
  • What type of bond is formed between a δ+ hydrogen and a δ– oxygen in water molecules?

  • Ionic bond
  • Polar bond
  • Covalent bond
  • Hydrogen bond (correct)
  • Why is water commonly referred to as the universal solvent?

    <p>As it can dissolve a large number of substances</p> Signup and view all the answers

    What property of oxygen contributes to the polarity of water?

    <p>Its strong attraction to shared electrons</p> Signup and view all the answers

    What type of bond can water form with other water molecules?

    <p>Hydrogen bonds</p> Signup and view all the answers

    Which substances are considered hydrophilic?

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

    What property of water results in a relatively high surface tension?

    <p>Cohesive properties</p> Signup and view all the answers

    What allows water to absorb large amounts of heat energy before changing state?

    <p>Extensive hydrogen bonding</p> Signup and view all the answers

    Why does ice float on water?

    <p>Ice is less dense than water</p> Signup and view all the answers

    What thermal property makes water an effective coolant?

    <p>High specific heat capacity</p> Signup and view all the answers

    Study Notes

    Water's Polarity and Solubility

    • Water can form polar associations with other charged molecules due to its slight positive charge on hydrogen atoms (δ+) and slight negative charge on oxygen atoms (δ–).
    • Water's polarity enables it to dissolve a large number of substances, earning it the title of "universal solvent".
    • The bond formed between the δ+ hydrogen and δ– oxygen in water molecules is a hydrogen bond, a type of intermolecular force.

    Water's Properties

    • Oxygen's high electronegativity contributes to the polarity of water.
    • Water can form hydrogen bonds with other water molecules, allowing for strong intermolecular attractions.
    • Hydrophilic substances are those that have an affinity for water, often containing charged or polar groups.

    Water's Surface Tension and Thermal Properties

    • Water's high surface tension results from the strong hydrogen bonds between molecules at the surface.
    • Water's high specific heat capacity allows it to absorb large amounts of heat energy before changing state.
    • Water's high specific heat capacity also makes it an effective coolant, as it can absorb and release heat energy slowly.

    Water's Anomalous Behavior

    • Ice floats on water because the hydrogen bonds in solid ice are arranged in a way that creates a less dense crystal structure than liquid water.
    • Water's unusual thermal properties, such as its high specific heat capacity, make it an effective coolant and allow it to play a crucial role in many biological and geological processes.

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    Description

    Test your knowledge on the structure of water and its ability to form hydrogen bonds with other molecules. Learn about the dipolarity of water, hydrogen bonding, and the electronegativity of oxygen.

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