Exp 2 study guide

Intermolecular Forces (IMFs)

Forces of attraction or repulsion between molecules that influence properties such as boiling points.

Relationship Between IMF Strength and Boiling Point

Higher IMF strength generally leads to higher boiling points due to stronger interactions between molecules.

Distillation

A separation technique that involves heating a liquid to create vapor and then cooling the vapor back to liquid to separate components.

Simple Distillation

A method to separate liquid components with significantly different boiling points, typically effective for purifying liquids.

Fractional Distillation

A technique used to separate mixtures of liquids with closer boiling points, utilizing a fractionating column for better separation.

Distillation Graph

A graphical representation showing boiling point, liquid or gas percentage, and mole fraction of components during distillation.

Sand Bath

A component in distillation setups used to provide even heating to the flask.

Thermometer Placement in Distillation Setup

The thermometer should be placed at the top of the distillation flask to accurately measure the boiling point of the vapor.

Common Distillation Problem: Distilling to Dryness

A problem in distillation where all liquid is evaporated, potentially damaging the distillation apparatus.

Effect of Temperature on Density

Density is affected by temperature because most substances expand when heated, resulting in lower density.