AP CHEMISTRY 3.6 to 3.10

Front

What is solubility?

Back

Solubility is the ability of a substance (solute) to dissolve in a solvent, forming a homogeneous solution at a specified temperature and pressure.

Front

Which type of molecules are generally soluble in nonpolar solvents like hexane?

Back

Nonpolar covalent molecules are generally soluble in nonpolar solvents due to similar intermolecular forces.

Front

What is the principle behind chromatography?

Back

Chromatography separates components of a mixture based on their different affinities for a stationary phase and a mobile phase.

Front

What does it mean if a substance is more polar?

Back

A more polar substance has a greater difference in electronegativity between its atoms, leading to a stronger dipole moment.

Front

What is the effect of polarity on solubility in water?

Back

Polar substances tend to be soluble in water, while nonpolar substances are generally insoluble due to the 'like dissolves like' principle.

Front

What is the role of the hydroxyl (OH) group in solubility?

Back

The hydroxyl (OH) group can increase the solubility of a molecule in water by forming hydrogen bonds with water molecules.

Front

What factors influence the melting point of a substance?

Back

Factors include molecular weight, intermolecular forces, and molecular structure.

Front

Why does Cl2 have a higher melting point than F2?

Back

Cl2 has more electrons and greater polarizability, leading to stronger London dispersion forces compared to F2.

Front

What is the significance of molar mass in solubility?

Back

Molar mass can influence solubility; larger molecules may have different solubility characteristics compared to smaller ones.

Front

What is a polar covalent bond?

Back

A polar covalent bond is a type of chemical bond where electrons are shared unequally between two atoms, resulting in a dipole moment.