This document discusses properties of solutions including: - Types of solutions defined by the states of the solute and solvent. - Terms used to describe solution composition such as dilute, concentrated, molarity, mass percent, mole fraction, and molality. - Molarity is expressed as moles of solute per liter of solution and is dependent on temperature while molality is independent of temperature. - Heat of solution is the enthalpy change of dissolving a solute and is the sum of enthalpy changes from solute particles separating and solvent particles making space. - Solubility is influenced by entropy; the mixed state has many more configurations than the unmixed state.