CHEM 1A03 Lecture Notes - Lecture 4: Intermolecular Force, London Dispersion Force, Ionic Compound

• School: McMaster University
• Department: Chemistry
• Course: CHEM 1A03
• Professor: David Brock

Document Summary

Homogeneous mixtures of substances composed of at least one solute (substance that gets dissolved) and one solvent (substance that does the dissolving). An aqueous solution is a homogeneous mixture using water as the solvent. Electrolytes are compounds that conduct electricity in aqueous solutions, while nonelectrolytes do not conduct electricity. Intermolecular forces the force of attraction and repulsion between molecules. Generally much weaker than covalent and ionic bonds (intramolecular forces: dipole-dipole forces. A force of attraction between polar molecules where the oppositely charged dipoles attract one another the greater the polarity of the molecule, the greater the strength of the dipole-dipole force hydrogen bonds. Due to the simultaneous attraction of the elecrons of one molecule by the positive nuclei in the surrounding molecules. By increasing the number of electrons in the molecule, the strength of london forces increases. For solutions to result, intermolecular forces must form between the particles of the solvent and the particles of the solute.