Molecule Polarity Flashcards
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Questions and Answers

Is HF (hydrogen fluoride) polar or nonpolar?

  • Nonpolar
  • Polar (correct)

    • Is H2O (water) polar or nonpolar?

  • Polar (correct)
  • Nonpolar

    • Is NH3 (ammonia) polar or nonpolar?

  • Nonpolar
  • Polar (correct)

    • Is HCl (hydrogen chloride) polar or nonpolar?

    <p>Polar (B)</p> Signup and view all the answers

    Is PCl3 (phosphorous trichloride) polar or nonpolar?

    <p>Polar (B)</p> Signup and view all the answers

    Is C (pure unbonded carbon) polar or nonpolar?

    <p>Nonpolar (B)</p> Signup and view all the answers

    Is H2S (hydrogen sulfide) polar or nonpolar?

    <p>Polar (B)</p> Signup and view all the answers

    Is CCl4 (carbon tetrachloride) polar or nonpolar?

    <p>Nonpolar (B)</p> Signup and view all the answers

    Is NaCl (sodium chloride) polar or nonpolar?

    <p>Ionic (metal &amp; nonmetal) (B)</p> Signup and view all the answers

    Is I2 (molecular iodine) polar or nonpolar?

    <p>Nonpolar (A)</p> Signup and view all the answers

    Is CH3OH (methanol) polar or nonpolar?

    <p>Polar (A)</p> Signup and view all the answers

    Are all molecules with formula types like N2, H2, O2, CO2, Cl2 polar or nonpolar?

    <p>Nonpolar (A)</p> Signup and view all the answers

    Is CH3Cl (chloromethane) polar or nonpolar?

    <p>Polar (B)</p> Signup and view all the answers

    Is C6H12O6 (glucose) polar or nonpolar?

    <p>Nonpolar (A)</p> Signup and view all the answers

    Is CH3CH2OH (ethanol) polar or nonpolar?

    <p>Polar (A)</p> Signup and view all the answers

    Is CH3COOH (acetic acid) polar or nonpolar?

    <p>Polar (B)</p> Signup and view all the answers

    Are noble gases polar or nonpolar?

    <p>Nonpolar (A)</p> Signup and view all the answers

    Is C6H6 (benzene) polar or nonpolar?

    <p>Nonpolar (A)</p> Signup and view all the answers

    Is CH4 (methane) polar or nonpolar?

    <p>Nonpolar (A)</p> Signup and view all the answers

    Is BF3 (boron trifluoride) polar or nonpolar?

    <p>Nonpolar (A)</p> Signup and view all the answers

    Is SF6 (sulfur hexafluoride) polar or nonpolar?

    <p>Nonpolar (A)</p> Signup and view all the answers

    Is C6H14 (hexane) polar or nonpolar?

    <p>Nonpolar (B)</p> Signup and view all the answers

    Is C2H2 (acetylene) polar or nonpolar?

    <p>Nonpolar (A)</p> Signup and view all the answers

    Study Notes

    Polar Molecules

    • HF (hydrogen fluoride) exhibits polarity due to the high electronegativity of fluorine, creating a dipole moment.
    • H2O (water) is a highly polar molecule, essential for its solvent properties and ability to form hydrogen bonds.
    • NH3 (ammonia) is polar, characterized by a nitrogen atom with a lone pair, leading to a distinct dipole.
    • HCl (hydrogen chloride) is polar because it possesses a significant electronegativity difference between hydrogen and chlorine.
    • PCl3 (phosphorous trichloride) is polar due to an asymmetrical shape and the electronegativity of chlorine.
    • H2S (hydrogen sulfide) is polar because of the electronegativity difference between hydrogen and sulfur, resulting in a bent geometry.
    • CH3OH (methanol) is polar owing to the hydroxyl group (-OH) that creates a strong dipole.
    • CH3Cl (chloromethane) is polar due to the electronegativity of chlorine affecting molecular symmetry.
    • CH3CH2OH (ethanol) is a polar molecule, which also contains a hydroxyl group, enabling hydrogen bonding.
    • CH3COOH (acetic acid) is polar with a functional carboxyl group contributing to its polarity.

    Nonpolar Molecules

    • Pure unbonded carbon (C) is nonpolar as there are no differences in electronegativity.
    • CCl4 (carbon tetrachloride) is nonpolar due to its symmetrical tetrahedral shape, resulting in cancellation of dipoles.
    • I2 (molecular iodine) is nonpolar, as it is composed of two identical atoms sharing electrons equally.
    • Molecules like N2, H2, O2, CO2, and Cl2 are nonpolar; they consist of the same element or have symmetrical arrangements.
    • C6H12O6 (glucose) is mistakenly noted as nonpolar; it is in fact polar due to multiple hydroxyl groups.
    • Any noble gas is inherently nonpolar because of a complete valence shell and lack of bonds.
    • C6H6 (benzene) is nonpolar owing to its symmetrical ring structure despite having C-H bonds.
    • CH4 (methane) is nonpolar due to its symmetrical tetrahedral geometry.
    • BF3 (boron trifluoride) is nonpolar because of its trigonal planar symmetry, leading to balanced charge distribution.
    • SF6 (sulfur hexafluoride) is nonpolar, with an octahedral structure that cancels dipole moments.
    • C6H14 (hexane) is nonpolar, a straight-chain hydrocarbon with a symmetrical structure.
    • C2H2 (acetylene) is nonpolar; it has a linear structure and symmetrical electron distribution.

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    Test your knowledge on molecular polarity with these flashcards. From hydrogen fluoride to ammonia, determine which molecules are polar or nonpolar. Perfect for chemistry students looking to reinforce their understanding of molecular behavior.

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