Lecture 1 Summary

We briefly consider the various units of measurement, terminology and conversions, and the importance of dimensional analysis, and solution chemistry. To understand solution chemistry, we need to be familiar with the definitions of solute, solvent, and solution. Solutes may be strong or weak electrolytes. There are several definitions of concentration, all of which apply to solution chemistry. Molar concentration, or molarity, is defined in terms of moles solute per liter solution. Concentrations may also be expressed as mass of solute over volume solution. units (e.g. grams per liter). Molality is defined as mole solute per 1000 g (1 kg) of solvent. The text discusses preparation of solutions. Analytical chemists make use of percentage or fractional composition of solutions or mixtures. The units parts per million (ppm) and parts per billion (ppb) were defined and discussed.