AP Chemistry - Unit 3 - Thou Shall Not Forget

Front

What is a hydrogen bond?

Back

A hydrogen bond is a weak attraction between a hydrogen atom covalently bonded to a highly electronegative atom (like O, N, or F) and another electronegative atom.

Front

List the four types of intermolecular forces from weakest to strongest.

Back

London dispersion, dipole-dipole, hydrogen bonding, ion-dipole.

Front

What conditions do real gases behave most like ideal gases?

Back

High temperature and low pressure.

Front

What does a high Rf value indicate in chromatography?

Back

A high Rf value indicates a strong affinity to the mobile phase.

Front

What is the definition of London dispersion forces?

Back

London dispersion forces are weak intermolecular forces arising from temporary dipoles in molecules.

Front

What is dipole-dipole interaction?

Back

Dipole-dipole interactions are attractive forces between the positive end of one polar molecule and the negative end of another polar molecule.

Front

What is the significance of ion-dipole forces?

Back

Ion-dipole forces are important in solutions where ionic compounds are dissolved in polar solvents, influencing solubility.

Front

How do temperature and pressure affect gas behavior?

Back

Increasing temperature generally increases gas behavior towards ideality, while increasing pressure can lead to deviations from ideal behavior.

Front

What is the difference between a polar and nonpolar molecule?

Back

Polar molecules have a net dipole moment due to uneven distribution of electrons, while nonpolar molecules do not.

Front

What is the role of electronegativity in bond formation?

Back

Electronegativity determines how electrons are shared between atoms, influencing bond type (ionic, covalent, or polar covalent).